94 KiB
2019 - Updates are in Progress
It's been a little while getting back around to the Cookbook. As a result, some of the information was using older design patterns and some better examples need to be included. There have been about 1/3 of the changes made so far that need to get made, so be patient.
The PySimpleGUI Cookbook
Welcome to the PySimpleGUI Cookbook! It's provided as but one component of a larger documentation effort for the PySimpleGUI package. It's purpose is to give you a jump start.
You'll find that starting with a Recipe will give you a big jump-start on creating your custom GUI. Copy and paste one of these Recipes and modify it to match your requirements. Study them to get an idea of some design patterns to follow.
There is a short section in the main documentation at http://www.PySimpleGUI.org with instructions on installing PySimpleGUI. Typically it's pip install pysimplegui to install.
The "Demo Programs" Are Also Recipes
If you like this Cookbook, then you'll LOVE the 200 sample programs that are just like these. You'll find them in the GitHub at http://www.PySimpleGUI.com. They are located in the folder DemoPrograms and there is also a Demo Programs folder for each of the PySimpleGUI ports.
These programs are updated frequently, much more so than this Cookbook document. It's there that you'll find the largest potential for a big jump-start on your project.
These short Demo Programs fall into 2 categories:
- Demonstrate a particular Element
- Integration with another package (e.g. Matplotlib, OpenCV, etc)
So, for example, if you're trying to use the Graph Element to create a line graph, check out the demo programs... there are 8 different demos for the Graph Element alone.
Trinket, the Online PySimpleGUI Cookbook
In addition to this document, you'll find a number of "recipes" running on Trinket. The PySimpleGUI Trinket Demo Programs are often accompanied by explanatory text. Because it's an actively used educational capability, you'll find newer PySimpleGUI features demonstrated there.
The advantage to "live", online PySimpleGUI demos is that you can examine the source code, run it, and see the GUI in your browser window, without installing anything on your local machine. No Python, no PySimpleGUI, only your browser is needed to get going.
Repl.it... another online resource
The PySimpleGUI repl.it repository is also used, but it doesn't provide the same kind of capability to provide some explanatory text and screenshots with the examples. It does, however, automatically install the latest version of PySimpleGUI for many of the examples. It also enables the demo programs to access any package that can be pip installed. Trinket does not have this more expansive capability.
Cookbook Purpose
A quick explanation about this document. The PySimpleGUI Cookbook is meant to get you started quickly. But that's only part of the purpose. The other, probably more important one, is coding conventions. The more of these examples and the programs you see in the Demo Programs section on the GitHub, the more familiar certain patterns will emerge.
It's through the Cookbook and the Demo Programs that new PySimpleGUI constructs and naming conventions are "rolled out" to the user community. If you are brand new to PySimpleGUI, then you're getting your foundation here. That foundation changes over time as the package improves. The old code still runs, but it's been improved.
PEP8 names are a really good example. Previously many of the method names for the Elements were done with CamelCase which is not a PEP8 compliant way of naming those functions. They should have been snake_case. Now that a complete set of PEP8 bindings is available, the method names are being changed here, in the primary documentation and in the demo programs. window.Read() became window.read(). It's better that you see examples using the newer windows.read() names.
In short, it's brainwashing you to program PySimpleGUI a certain way. The effect is that one person has no problem picking up the code from another PySimpleGUI programmer and recognizing it. If you stick with variable names shown here, like many other PySimpleGUI users have, then you'll understand other people's code (and the demos too) quicker.
Keys
Keys are an extremely important concept for you to understand as you learn PySimpleGUI. They are the "labels" you give Elements. Keys are used:
- To tell you when one of them generates an event
- When you want to change them later
- To communicate their value when performing a
window.read()
Important - while they are shown as strings in many examples, they can be ANYTHING (ints, tuples, lists, objects, ....)
GETTING STARTED - Copy these design patterns!
All of your PySimpleGUI programs will utilize one of these 2 design patterns depending on the type of window you're implementing. The two types of windows are:
- One-shot
- Persistent
The One-shot window is one that pops up, collects some data, and then disappears. It is more or less a 'form' meant to quickly grab some information and then be closed.
The Persistent window is one that sticks around. With these programs, you loop, reading and processing "events" such as button clicks. It's more like a typical Windows/Mac/Linux program.
Recipe - Pattern 1 - "One-shot Window" - (The Simplest Pattern)
Or with the addition of:
sg.change_look_and_feel('DarkBlue1') # or DarkTanBlue if using older PySimpleGUI versions
you get this color scheme
This will be the most common pattern you'll follow if you are not using an "event loop" (not reading the window multiple times). The window is read and then closed.
When you "read" a window, you are returned a tuple consisting of an event and a dictionary of values.
Theevent is what caused the read to return. It could be a button press, some text clicked, a list item chosen, etc, or None if the user closes the window.
The values is a dictionary of values of all the input-style elements. Dictionaries use keys to define entries. If your elements do not specificy a key, one is provided for you. These auto-numbered keys are ints starting at zero.
This design pattern does not specify a key for the InputText element, so its key will be auto-numbered and is zero in this case. Thus the design pattern can get the value of whatever was input by referencing values[0]
import PySimpleGUI as sg
sg.change_look_and_feel('DarkBlue1')
layout = [[sg.Text('My one-shot window.')],
[sg.InputText()],
[sg.Submit(), sg.Cancel()]]
window = sg.Window('Window Title', layout)
event, values = window.read()
window.close()
text_input = values[0]
sg.popup('You entered', text_input)
If you want to use a key instead of an auto-generated key:
import PySimpleGUI as sg
sg.change_look_and_feel('DarkBlue1')
layout = [[sg.Text('My one-shot window.')],
[sg.InputText(key='-IN-')],
[sg.Submit(), sg.Cancel()]]
window = sg.Window('Window Title', layout)
event, values = window.read()
window.close()
text_input = values['-IN-']
sg.popup('You entered', text_input)
Recipe - Pattern 2 A - Persistent window (multiple reads using an event loop)
Some of the more advanced programs operate with the window remaining visible on the screen. Input values are collected, but rather than closing the window, it is kept visible acting as a way to both output information to the user and gather input data. In other words, a typical Window, Mac or Linux window.
Let this sink in for a moment.... in 10 lines of Python code, you can display and interact with your own custom GUI window. You are writing "real GUI code" (as one user put it) that will look and act like other windows you're used to using daily.
This code will present a window and will print values until the user clicks the exit button or closes window using an X.
import PySimpleGUI as sg
sg.change_look_and_feel('DarkAmber') # Remove line if you want plain gray windows
layout = [[sg.Text('Persistent window')],
[sg.Input(key='-IN-')],
[sg.Button('Read'), sg.Exit()]]
window = sg.Window('Window that stays open', layout)
while True: # The Event Loop
event, values = window.read()
print(event, values)
if event in (None, 'Exit'):
break
window.close()
Here is some sample output from this code:
Read {'-IN-': 'typed into input field'}
Read {'-IN-': 'More typing'}
Exit {'-IN-': 'clicking the exit button this time'}
The first thing printed is the "event" which in this program is the buttons. The next thing printed is the values variable that holds the dictionary of return values from the read. This dictionary has only 1 entry. The "key" for the entry is '-IN-' and matches the key passed into the Input element creation on this line of code:
[sg.Input(key='-IN-')],
If the window was close using the X, then the output of the code will be:
None {'-IN-': None}
The event returned from the read is set to None and so are the input fields in the window. This None event is super-important to check for. It must be detected in your windows or else you'll be trying to work with a window that's been destroyed and your code will crash. This is why you will find this check after every window.read() call you'll find in sample PySimpleGUI code.
In some cirsumstances when a window is closed with an X, both of the return values from window.read() will be None. This is why it's important to check for event is None before attempting to access anything in the values variable.
Recipe - Pattern 2 B - Persistent window (multiple reads using an event loop + updates data in window)
This is a slightly more complex, but more realistic version that reads input from the user and displays that input as text in the window. Your program is likely to be doing both of those activities so this will give you a big jump-start.
Do not worry yet what all of these statements mean. Just copy it so you can begin to play with it, make some changes. Experiment to see how thing work.
import PySimpleGUI as sg
sg.change_look_and_feel('BluePurple')
layout = [[sg.Text('Your typed chars appear here:'), sg.Text(size=(15,1), key='-OUTPUT-')],
[sg.Input(key='-IN-')],
[sg.Button('Show'), sg.Button('Exit')]]
window = sg.Window('Pattern 2B', layout)
while True: # Event Loop
event, values = window.read()
print(event, values)
if event in (None, 'Exit'):
break
if event == 'Show':
# Update the "output" text element to be the value of "input" element
window['-OUTPUT-'].update(values['-IN-'])
window.close()
There are multiple ways out "outputting" to an element, or changing an element in some way, in a window. The way we're achieving output here is by changing a Text Element with this statement:
window['-OUTPUT-'].update(values['-IN-'])
window['-OUTPUT-'] returns the element that has the key '-OUTPUT-'. Then the update method for that element is called so that the value of the Text Element is modified.
This construct, window['-OUTPUT-'] was added in 2019.
The original / old-style way of doing this was to call window.FindElement or the shortened window.Element
window.FindElement('-OUTPUT-').update(values['-IN-'])
or
window.Element('-OUTPUT-').update(values['-IN-'])
Even this can be further shortened. If you "call" an existing element, then it is the same as calling that element's Update method. To do this, you simply delete the .update from the statement and you're left with:
window['-OUTPUT-'](values['-IN-'])
Yes, it looks a little strange.
The Summary
window[key] means you're finding an element in that window. Anything after that part of the statement means you're working directly with an element. Maybe the element has another method besides update you want to call, like set_tooltip(). If so, then it is written simply as:
window[my_key].set_tooltip('New Tooltip') # note - only in base PySimpleGUI port currently
Exiting a Window
For persistent windows, you will find this if statement immediately following every window.read call you'll find in this document and likely all of the demo programs:
if event in (None, 'Quit'):
break
This is your user's "way out". Always give a way out to your user or else they will be using task manager or something else, all the while cursing you.
Beginners to Python may not understand this statement and it's important to understand it so that you don't simply ignore it because you don't understand the syntax.
The if statment is identical to this if statement:
if event is None or event == 'Quit':
break
The event in (None, 'Quit') simply means is the value of the event variable in the list of choices shown, in this case None or Quit. If so, then break out of the Event Loop and likely exit the program when that happens for simple programs.
Close Your Windows
When you're done with your window, close it.
window.close()
The reason is that for some ports, like PySimpleGUIWeb, you cannot exit the program unless the window is closed. It's nice to clean up after yourself too.
Closing in Multithreaded Environment
If you've got other threads running in program system in addition to the main program thread, you need to delete the window as well as close it or else you may get an error that tkinter has detected it is not running in the main thread.
window.close()
del window
Note that you cannot make any PySimpleGUI calls from a thread other than the main program thread.
Window "Beautification" - Colors Other Than Gray... Use them!
One complaint about tkinter that is often heard is how "ugly" it looks. You can do something about that in 1 line of PySimpleGUI code.
A call to change_look_and_feel will set the colors to be used when creating windows. It sets text color, background color, input field colors, button color,.... 13 different settings are changed.
import PySimpleGUI as sg
sg.change_look_and_feel('GreenMono')
At the start of Nov 2019, the list of valid look and feel settings includes:
SystemDefault, Material1, Material2, Reddit, Topanga, GreenTan, Dark, LightGreen, Dark2, Black, Tan, TanBlue, DarkTanBlue, DarkAmber, DarkBlue, Reds, Green, BluePurple, Purple, BlueMono, GreenMono, BrownBlue, BrightColors, NeutralBlue, Kayak, SandyBeach, TealMono
A quick reference of Themes available in releases prior to November 2019
Even windows that are created for you, such as popups, will use the color settings you specify. And, you can change them at any point, even mid-way through defining a window layout.
This one line of code helps, but it's not the only thing that is going to make your window attractive. "Beautiful windows" don't just happen.
Mac users - Unfortunately tkinter and the Mac haven't been playing well together when it comes to colors, in particular button colors. The Themes you see here will set everything except the button colors on a Mac.
Look and Feel Theme Explosion
In Nov 2019 the number of available themes balooned to 105 Themes. The existing 28 themes are still available and they are available using 2 different naming schemes, the initial names as seen in the above image and a new naming format explained below.
These new additions were added beginning with release 4.6 of the tkinter port of PySimpleGUI. They were simultaneously released to the other 3 ports of PySimpleGUI as well (Qt, WxPython, Remi)
A quick reference of Themes available in releases after mid November 2019
Theme Name Format
In addition to getting lots of new Themes, the process of choosing and specifying one was improved.
You can look at the table of available themes to get the name of a theme you want to try, or you can "guess" at one using this formula:
<"Dark" | "Light"> <Color> [#]
Where Color is one of these:
Black, Blue, Green, Teal, Brown, Yellow, Gray, Purple
The # is optional and is used when there is more than 1 choice for a color. For example, for "Dark Blue" there are 12 different themes (Dark Blue, and Dark Blue 1-11). These colors specify the rough color of the background. These can vary wildly so you'll have to try them out to see what you like the best.
Recipe - Built-in Theme Viewer
If you want to see a window on your system like the above screenshot, then make this call and you'll see the same window:
import PySimpleGUI as sg
sg.preview_all_look_and_feel_themes()
Specifying and Getting Theme Names
In addition to getting all of these new themes, the format of the string used to specify them got "fuzzy". You no longer have to specify the exact string shown in the preview. Now you can add spaces, change the case, even move words around and you'll still get the correct theme.
For example the theme "DarkBrown2" can be specified also as "Dark Brown 2".
If you can't remember the names and get it wrong, you'll get a text list of the available choices printed on your console.
You can also get the list of theme names by calling list_of_look_and_feel_values
import PySimpleGUI as sg
theme_name_list = sg.list_of_look_and_feel_values()
Also, if you guess incorrectly, then you'll get a random theme presented instead of some hard coded default. You were calling change_look_and_feel to get more color, in theory, so instead of giving you a gray window, you'll get a randomly chosen theme (and you'll get the name of this theme printed on the console)
Recipe - Theme Previewer
If you don't like the theme previewer built into PySimpleGUI, then you can write your own like in this recipe.
import PySimpleGUI as sg
WINDOW_BACKGROUND = 'lightblue'
def sample_layout():
return [[sg.Text('Text element'), sg.InputText('Input data here', size=(12,1))],
[sg.Button('Ok'), sg.Button('Cancel')] ]
layout = [[sg.Text('My Theme Previewer', font='Default 18', background_color=WINDOW_BACKGROUND)]]
row = []
for count, theme in enumerate(sg.ListOfLookAndFeelValues()):
sg.change_look_and_feel(theme)
if not count % 10:
layout += [row]
row = []
row += [sg.Frame(theme, sample_layout())]
if row:
layout += [row]
sg.Window('Window Title', layout, background_color=WINDOW_BACKGROUND).read()
Recipe - Look and Feel Browser
This Recipe is a "Look and Feel Browser" that enables you to see the different color schemes.
You're first shown this window that lists all of the available "Look and Feel" settings. This window was created after the Look and Feel were set to "Dark Brown".
If you click on an item in the list, you will immediately get a popup window that is created using the new Look and Feel.
import PySimpleGUI as sg
"""
Allows you to "browse" through the look and feel settings. Click on one and you'll see a
Popup window using the color scheme you chose. It's a simple little program that also demonstrates
how snappy a GUI can feel if you enable an element's events rather than waiting on a button click.
In this program, as soon as a listbox entry is clicked, the read returns.
"""
sg.change_look_and_feel('Dark Brown')
layout = [[sg.Text('Look and Feel Browser')],
[sg.Text('Click a look and feel color to see demo window')],
[sg.Listbox(values=sg.list_of_look_and_feel_values(),
size=(20, 12), key='-LIST-', enable_events=True)],
[sg.Button('Exit')]]
window = sg.Window('Look and Feel Browser', layout)
while True: # Event Loop
event, values = window.read()
if event in (None, 'Exit'):
break
sg.change_look_and_feel(values['-LIST-'][0])
sg.popup_get_text('This is {}'.format(values['-LIST-'][0]))
window.close()
Making Changes to Themes & Adding Your Own Themes
Modifying and creating your own theme is not difficult.
The Look and Feel Theme definitions are stored in a dictionary. The underlying dictionary can be directly accessed via the variable LOOK_AND_FEEL_TABLE.
A single entry in this dictionary has this format (copy this code):
'LightGreen3': {'BACKGROUND': '#A8C1B4',
'TEXT': 'black',
'INPUT': '#DDE0DE',
'SCROLL': '#E3E3E3',
'TEXT_INPUT': 'black',
'BUTTON': ('white', '#6D9F85'),
'PROGRESS': DEFAULT_PROGRESS_BAR_COLOR,
'BORDER': 1,
'SLIDER_DEPTH': 0,
'PROGRESS_DEPTH': 0}
As you can see, a single entry in the Look and Feel dictionary is itself a dictionary.
Modifying an existing entry
Let's say you like the LightGreeen3 Theme, except you would like for the buttons to have black text instead of white. You can change this by modifying the entry in the table directly.
import PySimpleGUI as sg
sg.change_look_and_feel('LightGreen3')
sg.popup_no_wait('This is the standard LightGreen3 Theme', 'It has white button text')
# Modify the theme directly
sg.LOOK_AND_FEEL_TABLE['LightGreen3']['BUTTON'] = ('black', '#6D9F85')
sg.change_look_and_feel('LightGreen3')
sg.popup('This is the modified LightGreen3 Theme', 'It has black button text')
Produces these 2 windows
Adding Your Own Theme
The great thing about these themes is that you set it onces and all future Elements will use the new settings. If you're adding the same colors in your element definitions over and over then perhaps making your own theme is in order.
Let's say that you need to match a logo's green color and you've come up with matching other colors to go with it. To add the new theme to the standard themes this code will do it:
import PySimpleGUI as sg
# Add your new theme colors and settings
sg.LOOK_AND_FEEL_TABLE['MyNewTheme'] = {'BACKGROUND': '#709053',
'TEXT': '#fff4c9',
'INPUT': '#c7e78b',
'TEXT_INPUT': '#000000',
'SCROLL': '#c7e78b',
'BUTTON': ('white', '#709053'),
'PROGRESS': ('#01826B', '#D0D0D0'),
'BORDER': 1, 'SLIDER_DEPTH': 0, 'PROGRESS_DEPTH': 0,
}
# Switch to use your newly created theme
sg.change_look_and_feel('MyNewTheme')
# Call a popup to show what the theme looks like
sg.popup_get_text('This how the MyNewTheme custom theme looks')
More Ways to "Dress Up Your Windows"
In addition to color there are a several of other ways to potentially make your window more attractive. A few easy ones include:
- Remove the titlebar
- Make your window semi-transparent
- Replace normal buttons with graphics
You can use a combination of these 3 settings to create windows that look like Rainmeter style desktop-widgets.
This window demonstrates these settings. As you can see, there is text showing through the background of the window. This is because the "Alpha Channel" was set to a semi-transparent setting. There is no titlebar going across the window and there is a little red X in the upper corner, resumably to close the window.
Removing the Titlebar & Making Semi-Transparent
Both of these can be set when you create your window. These 2 parameters are all you need - no_titlebar and alpha_channel.
When creating a window without a titlebar you create a problem where the user is unable to move your window as they have no titlebar to grab and drag. Another parameter to the window creation will fix this problem - grab_anywhere. When true, this parameter allows the user to move the window by clicking anywhere within the window and dragging it, just as if they clicked the titlebar. Some PySimpleGUI ports allow you to click on input fields and drag, others require you to grab a spot on the background of the window. Note - you do not have to remove the titlebar in order to use grab_anywhere
To create a window like the one above, your window creation call would look something like:
window = sg.Window('PSG System Dashboard', layout, no_titlebar=True, alpha_channel=.5, grab_anywhere=True)
Replacing a Button with a Graphic
In PySimpleGUI you can use PNG and GIF image files as buttons. You can also encode those files into Base64 strings and put them directly into your code.
It's a 4 step process to make a button using a graphic
- Find your PNG or GIF graphic
- Convert your graphic into a Base64 byte string
- Add Base64 string to your code as a variable
- Specify the Base64 string as the image to use when creating your button
Step 1 - Find your graphic
There are a LOT of places for you to find your graphics. This page lists a number of ways to search for what you need. Bing also has a great image search tool that you can filter your results on to get a list of PNG files (choose "Transparent" using their "filter" on the page.)
Here's the search results for "red x icon" using Bing with a filter.
I chose this one from the list: http://icons.iconarchive.com/icons/iconarchive/red-orb-alphabet/256/Letter-X-icon.png
You can download your image or get a copy of the link to it.
Step 2 - Convert to Base64
One of the demo programs provided on the PySimpleGUI GitHub is called "Demo_Base64_Image_Encoder.py". This program will convert all of the images in a folder and write the encoded data to a file named output.py.
You can also use an online conversion tool such as https://base64.guru/converter/encode/image
On that page I chose to use the "Remote URL" (see above), pasted it into the input box and clicked "Encode image to Base64". Under the encode button is an area labeled "Base64". If your conversion was successful, you'll see it filled with data like shown here:
Step 3 - Make Base64 String Variable
Select all of the data in the Base64 box and paste into your code by making a variable that is equal to a byte-string.
red_x_base64 = b''
Paste the long data you got from the webpage inside the quotes after the b.
You can also copy and paste the byte string from the output.py file if you used the demo program.
Step 4 - Use Base64 Variable to Make Your Button
This is the Button Element that is added to the layout to create the Red X Button graphic.
The image_subsample parameter was used in this case because the button used in the example was HUGE. It measures 256.x256. The better approach would have been to download the button and then resize it. This parameter is only usable in the tkinter port of PySimpleGUI so it's better to have your graphics pre-sized to fit correctly.
The image_subsample value indicated how much to "divide" the size by. The value of "8" specified above means to use 1/8 the size of the original. If the value was "2" then 1/2 of the original size will be shown.
If your background is not the standard gray background, then you would set your button color to match the background the button is on.
sg.Button('', image_data=red_x_base64, button_color=sg.COLOR_SYSTEM_DEFAULT, border_width=0, image_subsample=8, key='Exit')
This is the window the code below creates using the button graphic found online.
You can run this code online on Trinket
import PySimpleGUI as sg
# Note that the base64 string is quite long. You can get the code from Trinket that includes the button
red_x_base64 = b'paste the base64 encoded string here'
layout = [ [sg.Text('My borderless window with a button graphic')],
[sg.Button('', image_data=red_x_base64, button_color=sg.COLOR_SYSTEM_DEFAULT, border_width=0, image_subsample=8, key='Exit')] ]
window = sg.Window('Window Title', layout)
while True: # Event Loop
event, values = window.read()
print(event, values)
if event in (None, 'Exit'):
break
window.close()
When working with PNG/GIF files as button images the background you choose for the button matters. It should match the background of whatever it is being placed upon.
For example, if the theme was changed to use DarkTeal7 and you did not change your Button element's background (left it as the system default), then your window will look like this:
To get it to match, change your Button element's background to match the one from the theme. Your Button in your layout will look like this:
sg.Button('', image_data=red_x_base64, button_color=('white',sg.LOOK_AND_FEEL_TABLE['DarkTeal7']['BACKGROUND']), border_width=0, image_subsample=8, key='Exit'
Recipe - 1 Shot Window - Simple Data Entry - Return Values - Auto Numbered
An Element's key will be automatically numbered, starting at 0, if you do not use the key parameter when creating an element and it's an element that will return values to you via the Window.read() call.
This example has no keys specified. The 3 input fields will have keys 0, 1, 2. Keys like this make the return values look like a list rather than a dictionary. Your first input element will be accessed as values[0], just like a list would look.
import PySimpleGUI as sg
sg.change_look_and_feel('Topanga') # Add some color to the window
# Very basic window. Return values using auto numbered keys
layout = [
[sg.Text('Please enter your Name, Address, Phone')],
[sg.Text('Name', size=(15, 1)), sg.InputText()],
[sg.Text('Address', size=(15, 1)), sg.InputText()],
[sg.Text('Phone', size=(15, 1)), sg.InputText()],
[sg.Submit(), sg.Cancel()]
]
window = sg.Window('Simple data entry window', layout)
event, values = window.read()
window.close()
print(event, values[0], values[1], values[2]) # the input data looks like a simple list when auto numbered
Recipe - Add GUI to Front-End of Script
Quickly add a GUI allowing the user to browse for a filename if a filename is not supplied on the command line using this simple GUI. It's the best of both worlds. If you want command line, you can use it. If you don't specify, then the GUI will fire up.
import PySimpleGUI as sg
import sys
if len(sys.argv) == 1:
layout = [[sg.Text('Document to open')],
[sg.In(), sg.FileBrowse()],
[sg.Open(), sg.Cancel()]]
window = sg.Window('My Script', layout)
event, values = window.read()
window.close()
fname = values[0]
print(event, values)
else:
fname = sys.argv[1]
if not fname:
sg.popup("Cancel", "No filename supplied")
raise SystemExit("Cancelling: no filename supplied")
else:
sg.popup('The filename you chose was', fname)
Recipe - The popup_get_file Version of Add GUI to Front-End of Script
Why recreate the wheel? There's a Popup function that will get a Filename for you. This is a single-line GUI:
fname = sg.popup_get_file('Document to open')
Shows this window and returns the results from the user interaction with it.
The entire Popup based solution for this get filename example is:
import PySimpleGUI as sg
import sys
if len(sys.argv) == 1:
fname = sg.popup_get_file('Document to open')
else:
fname = sys.argv[1]
if not fname:
sg.popup("Cancel", "No filename supplied")
raise SystemExit("Cancelling: no filename supplied")
else:
sg.popup('The filename you chose was', fname)
How about a GUI and traditional CLI argument in 1 line of code? Let's also add 1 line to get the colors to not be system-default-grey.
import PySimpleGUI as sg
import sys
sg.change_look_and_feel('Dark Grey 3')
fname = sys.argv[1] if len(sys.argv) > 1 else sg.popup_get_file('Document to open')
if not fname:
sg.popup("Cancel", "No filename supplied")
raise SystemExit("Cancelling: no filename supplied")
else:
sg.popup('The filename you chose was', fname)
Recall the (long) sections above about color? You can use the color themes even for these simple front-ends. Simply add a call to change_look_and_feel before you call any PySimpleGUI code like a popup. In this example, we're choosing "Dark Grey 3" for the color.
Recipe - Compare 2 Files
Sometimes you just need to get a couple of filenames. Browse to get 2 file names that can be then compared. By using Input elements the user can either use the Browse button to browse to select a file or they can paste the filename into the input element directly.
import PySimpleGUI as sg
sg.change_look_and_feel('Light Blue 2')
layout = [[sg.Text('Enter 2 files to comare')],
[sg.Text('File 1', size=(8, 1)), sg.Input(), sg.FileBrowse()],
[sg.Text('File 2', size=(8, 1)), sg.Input(), sg.FileBrowse()],
[sg.Submit(), sg.Cancel()]]
window = sg.Window('File Compare', layout)
event, values = window.read()
window.close()
print(f'You clicked {event}')
print(f'You chose filenames {values[0]} and {values[1]}')
Nearly All Elements with Color Theme, Menus, (The Everything Bagel)
Example of nearly all of the Elements in a single window. Uses a customized color scheme, lots of Elements, default values, Columns, Frames with colored text, tooltips, file browsing. There are at least 13 different Elements used.
Before scrolling down to the code, guess how many lines of Python code were required to create this custom layout window.
#!/usr/bin/env Python3
import PySimpleGUI as sg
sg.ChangeLookAndFeel('GreenTan')
# ------ Menu Definition ------ #
menu_def = [['File', ['Open', 'Save', 'Exit', 'Properties']],
['Edit', ['Paste', ['Special', 'Normal', ], 'Undo'], ],
['Help', 'About...'], ]
# ------ Column Definition ------ #
column1 = [[sg.Text('Column 1', background_color='#F7F3EC', justification='center', size=(10, 1))],
[sg.Spin(values=('Spin Box 1', '2', '3'), initial_value='Spin Box 1')],
[sg.Spin(values=('Spin Box 1', '2', '3'), initial_value='Spin Box 2')],
[sg.Spin(values=('Spin Box 1', '2', '3'), initial_value='Spin Box 3')]]
layout = [
[sg.Menu(menu_def, tearoff=True)],
[sg.Text('All graphic widgets in one window!', size=(30, 1), justification='center', font=("Helvetica", 25), relief=sg.RELIEF_RIDGE)],
[sg.Text('Here is some text.... and a place to enter text')],
[sg.InputText('This is my text')],
[sg.Frame(layout=[
[sg.Checkbox('Checkbox', size=(10,1)), sg.Checkbox('My second checkbox!', default=True)],
[sg.Radio('My first Radio! ', "RADIO1", default=True, size=(10,1)), sg.Radio('My second Radio!', "RADIO1")]], title='Options',title_color='red', relief=sg.RELIEF_SUNKEN, tooltip='Use these to set flags')],
[sg.Multiline(default_text='This is the default Text should you decide not to type anything', size=(35, 3)),
sg.Multiline(default_text='A second multi-line', size=(35, 3))],
[sg.InputCombo(('Combobox 1', 'Combobox 2'), size=(20, 1)),
sg.Slider(range=(1, 100), orientation='h', size=(34, 20), default_value=85)],
[sg.InputOptionMenu(('Menu Option 1', 'Menu Option 2', 'Menu Option 3'))],
[sg.Listbox(values=('Listbox 1', 'Listbox 2', 'Listbox 3'), size=(30, 3)),
sg.Frame('Labelled Group',[[
sg.Slider(range=(1, 100), orientation='v', size=(5, 20), default_value=25),
sg.Slider(range=(1, 100), orientation='v', size=(5, 20), default_value=75),
sg.Slider(range=(1, 100), orientation='v', size=(5, 20), default_value=10),
sg.Column(column1, background_color='#F7F3EC')]])],
[sg.Text('_' * 80)],
[sg.Text('Choose A Folder', size=(35, 1))],
[sg.Text('Your Folder', size=(15, 1), auto_size_text=False, justification='right'),
sg.InputText('Default Folder'), sg.FolderBrowse()],
[sg.Submit(tooltip='Click to submit this window'), sg.Cancel()]
]
window = sg.Window('Everything bagel', layout, default_element_size=(40, 1), grab_anywhere=False)
event, values = window.read()
sg.popup('Title',
'The results of the window.',
'The button clicked was "{}"'.format(event),
'The values are', values)
35 lines of code
That's what the window definition, creation, display and get values ultimately ended up being when you remove the blank lines above. Try displaying 13 seperate "GUI Widgets" in any of the GUI frameworks. There's $20 waiting for the person that can code up the same window in under 35 lines of Python code using tkinter, WxPython, or Qt. For compactness, it's difficult to beat PySimpleGUI simply because the PySimpleGUI code is running a ton of "boilerplate" code on your behalf.
Asynchronous Window With Periodic Update
An async Window that has a event loop, and updates a text element at a periodic interval. In this case, we're outputting the time elapsed into the window.
Use this design pattern for projects that need to poll or output something on a regular basis. In this case, we're indicating we want a timeout=10 on our window.read call. This will cause the Read call to return a "timeout key" as the event when a timeout has happened without some GUI thing happening first (like the user clicking a button). The timeout key is PySimpleGUI.TIMEOUT_KEY usually written as sg.TIMEOUT_KEY in normal PySimpleGUI code.
Use caution when using windows with a timeout. You should rarely need to use a timeout=0, non-blocking call, so try not to abuse this design pattern. Honest, you shouldn't do it unless you're a realtime application and know what you're doing. Hint - if you have < 1 year programming experience and you're using timeout=0, you're doing something wrong.
A note about timers... this is not a good design for a stopwatch as it can very easily drift. This would never pass for a good solution in a bit of commercial code. For better accuracy always get the actual time from a reputable source, like the operating system. Use that as what you use to measure and display the time.
import PySimpleGUI as sg
sg.change_look_and_feel('DarkBrown1')
layout = [ [sg.Text('Stopwatch', size=(20, 2), justification='center')],
[sg.Text('', size=(10, 2), font=('Helvetica', 20), justification='center', key='_OUTPUT_')],
[sg.T(' ' * 5), sg.Button('Start/Stop', focus=True), sg.Quit()]]
window = sg.Window('Stopwatch Timer', layout)
timer_running, counter = True, 0
while True: # Event Loop
event, values = window.read(timeout=10) # Please try and use as high of a timeout value as you can
if event in (None, 'Quit'): # if user closed the window using X or clicked Quit button
break
elif event == 'Start/Stop':
timer_running = not timer_running
if timer_running:
window['_OUTPUT_'].update('{:02d}:{:02d}.{:02d}'.format((counter // 100) // 60, (counter // 100) % 60, counter % 100))
counter += 1
Callback Function Simulation
The architecture of some programs works better with button callbacks instead of handling in-line. While button callbacks are part of the PySimpleGUI implementation, they are not directly exposed to the caller. The way to get the same result as callbacks is to simulate them with a recipe like this one.
import PySimpleGUI as sg
sg.change_look_and_feel('Light Blue 3')
# This design pattern simulates button callbacks
# Note that callbacks are NOT a part of the package's interface to the
# caller intentionally. The underlying implementation actually does use
# tkinter callbacks. They are simply hidden from the user.
# This implementation uses a simple "Dispatch Dictionary" to store events and functions
# The callback functions
def button1():
print('Button 1 callback')
def button2():
print('Button 2 callback')
# Lookup dictionary that maps button to function to call
dispatch_dictionary = {'1':button1, '2':button2}
# Layout the design of the GUI
layout = [[sg.Text('Please click a button', auto_size_text=True)],
[sg.Button('1'), sg.Button('2'), sg.Button('3'), sg.Quit()]]
# Show the Window to the user
window = sg.Window('Button callback example', layout)
# Event loop. Read buttons, make callbacks
while True:
# Read the Window
event, value = window.read()
if event in ('Quit', None):
break
# Lookup event in function dictionary
if event in dispatch_dictionary:
func_to_call = dispatch_dictionary[event] # get function from dispatch dictionary
func_to_call()
else:
print('Event {} not in dispatch dictionary'.format(event))
window.close()
# All done!
sg.popup_ok('Done')
OneLineProgressMeter
This recipe shows just how easy it is to add a progress meter to your code.
import PySimpleGUI as sg
sg.change_look_and_feel('Dark Blue 8')
for i in range(1000):
sg.OneLineProgressMeter('One Line Meter Example', i + 1, 1000, 'key')
Minesweeper-style Grid of Buttons
There are a number of applications built using a GUI that involve a grid of buttons. The games Minesweeper and Battleship can both be thought of as a grid of buttons.
Here is the code for the above window
import PySimpleGUIWeb as sg
from random import randint
MAX_ROWS = MAX_COL = 10
board = [[randint(0,1) for j in range(MAX_COL)] for i in range(MAX_ROWS)]
layout = [[sg.Button('?', size=(4, 2), key=(i,j), pad=(0,0)) for j in range(MAX_COL)] for i in range(MAX_ROWS)]
window = sg.Window('Minesweeper', layout)
while True:
event, values = window.read()
if event in (None, 'Exit'):
break
# window[(row, col)].update('New text') # To change a button's text, use this pattern
# For this example, change the text of the button to the board's value and turn color black
window[event].update(board[event[0]][event[1]], button_color=('white','black'))
window.close()
The most important thing for you to learn from this recipe is that keys and events can be any type, not just strings.
Thinking about this grid of buttons, doesn't it make the most sense for you to get row, column information when a button is pressed. Well, that's exactly what setting your keys for these buttons to be tuples does for you. It gives you the abilty to read events and finding the button row and column, and it makes updating text or color of buttons using a row, column designation.
This program also runs on PySimpleGUIWeb really well. Change the import to PySimpleGUIWeb and you'll see this in your web browser (assuming you've installed PySimpleGUIWeb)
Button Graphics (Media Player)
Buttons can have PNG of GIF images on them. This Media Player recipe requires 4 images in order to function correctly. The background is set to the same color as the button background so that they blend together.
#!/usr/bin/env python
import PySimpleGUI as sg
#
# An Async Demonstration of a media player
# Uses button images for a super snazzy look
# See how it looks here:
# https://user-images.githubusercontent.com/13696193/43159403-45c9726e-8f50-11e8-9da0-0d272e20c579.jpg
#
def MediaPlayerGUI():
background = '#F0F0F0'
# Set the backgrounds the same as the background on the buttons
sg.SetOptions(background_color=background, element_background_color=background)
# Images are located in a subfolder in the Demo Media Player.py folder
image_pause = './ButtonGraphics/Pause.png'
image_restart = './ButtonGraphics/Restart.png'
image_next = './ButtonGraphics/Next.png'
image_exit = './ButtonGraphics/Exit.png'
# A text element that will be changed to display messages in the GUI
# define layout of the rows
layout= [[sg.Text('Media File Player',size=(17,1), font=("Helvetica", 25))],
[sg.Text(size=(15, 2), font=("Helvetica", 14), key='output')],
[sg.Button('', button_color=(background,background),
image_filename=image_restart, image_size=(50, 50), image_subsample=2, border_width=0, key='Restart Song'),
sg.Text(' ' * 2),
sg.Button('', button_color=(background,background),
image_filename=image_pause, image_size=(50, 50), image_subsample=2, border_width=0, key='Pause'),
sg.Text(' ' * 2),
sg.Button('', button_color=(background,background), image_filename=image_next, image_size=(50, 50), image_subsample=2, border_width=0, key='Next'),
sg.Text(' ' * 2),
sg.Text(' ' * 2), sg.Button('', button_color=(background,background),
image_filename=image_exit, image_size=(50, 50), image_subsample=2, border_width=0, key='Exit')],
[sg.Text('_'*20)],
[sg.Text(' '*30)],
[
sg.Slider(range=(-10, 10), default_value=0, size=(10, 20), orientation='vertical', font=("Helvetica", 15)),
sg.Text(' ' * 2),
sg.Slider(range=(-10, 10), default_value=0, size=(10, 20), orientation='vertical', font=("Helvetica", 15)),
sg.Text(' ' * 2),
sg.Slider(range=(-10, 10), default_value=0, size=(10, 20), orientation='vertical', font=("Helvetica", 15))],
[sg.Text(' Bass', font=("Helvetica", 15), size=(9, 1)),
sg.Text('Treble', font=("Helvetica", 15), size=(7, 1)),
sg.Text('Volume', font=("Helvetica", 15), size=(7, 1))]
]
# Open a form, note that context manager can't be used generally speaking for async forms
window = sg.Window('Media File Player', layout, default_element_size=(20, 1),
font=("Helvetica", 25))
# Our event loop
while(True):
event, values = window.read(timeout=100) # Poll every 100 ms
if event == 'Exit' or event is None:
break
# If a button was pressed, display it on the GUI by updating the text element
if event != sg.TIMEOUT_KEY:
window['output'].update(event)
MediaPlayerGUI()
Script Launcher - Persistent Window
This Window doesn't close after button clicks. To achieve this the buttons are specified as sg.Button instead of sg.Button. The exception to this is the EXIT button. Clicking it will close the window. This program will run commands and display the output in the scrollable window.
import PySimpleGUI as sg
import subprocess
# Please check Demo programs for better examples of launchers
def ExecuteCommandSubprocess(command, *args):
try:
sp = subprocess.Popen([command, *args], shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = sp.communicate()
if out:
print(out.decode("utf-8"))
if err:
print(err.decode("utf-8"))
except:
pass
layout = [
[sg.Text('Script output....', size=(40, 1))],
[sg.Output(size=(88, 20))],
[sg.Button('script1'), sg.Button('script2'), sg.Button('EXIT')],
[sg.Text('Manual command', size=(15, 1)), sg.InputText(focus=True), sg.Button('Run', bind_return_key=True)]
]
window = sg.Window('Script launcher', layout)
# ---===--- Loop taking in user input and using it to call scripts --- #
while True:
(event, value) = window.read()
if event == 'EXIT' or event is None:
break # exit button clicked
if event == 'script1':
ExecuteCommandSubprocess('pip', 'list')
elif event == 'script2':
ExecuteCommandSubprocess('python', '--version')
elif event == 'Run':
ExecuteCommandSubprocess(value[0])
Launch a Program With a Button
Very simple script that will launch a program as a subprocess. Great for making a desktop launcher toolbar.
import subprocess
import PySimpleGUI as sg
CHROME = r"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe"
layout = [ [sg.Text('Text area', key='_TEXT_')],
[sg.Input(key='_URL_')],
[sg.Button('Chrome'), sg.Button('Exit')]]
window = sg.Window('Window Title', layuout)
while True: # Event Loop
event, values = window.read()
print(event, values)
if event is None or event == 'Exit':
break
if event == 'Chrome':
sp = subprocess.Popen([CHROME, values['_URL_']], shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
window.close()
Machine Learning GUI
A standard non-blocking GUI with lots of inputs.
import PySimpleGUI as sg
# Green & tan color scheme
sg.ChangeLookAndFeel('GreenTan')
sg.SetOptions(text_justification='right')
layout = [[sg.Text('Machine Learning Command Line Parameters', font=('Helvetica', 16))],
[sg.Text('Passes', size=(15, 1)), sg.Spin(values=[i for i in range(1, 1000)], initial_value=20, size=(6, 1)),
sg.Text('Steps', size=(18, 1)), sg.Spin(values=[i for i in range(1, 1000)], initial_value=20, size=(6, 1))],
[sg.Text('ooa', size=(15, 1)), sg.In(default_text='6', size=(10, 1)), sg.Text('nn', size=(15, 1)),
sg.In(default_text='10', size=(10, 1))],
[sg.Text('q', size=(15, 1)), sg.In(default_text='ff', size=(10, 1)), sg.Text('ngram', size=(15, 1)),
sg.In(default_text='5', size=(10, 1))],
[sg.Text('l', size=(15, 1)), sg.In(default_text='0.4', size=(10, 1)), sg.Text('Layers', size=(15, 1)),
sg.Drop(values=('BatchNorm', 'other'), auto_size_text=True)],
[sg.Text('_' * 100, size=(65, 1))],
[sg.Text('Flags', font=('Helvetica', 15), justification='left')],
[sg.Checkbox('Normalize', size=(12, 1), default=True), sg.Checkbox('Verbose', size=(20, 1))],
[sg.Checkbox('Cluster', size=(12, 1)), sg.Checkbox('Flush Output', size=(20, 1), default=True)],
[sg.Checkbox('Write Results', size=(12, 1)), sg.Checkbox('Keep Intermediate Data', size=(20, 1))],
[sg.Text('_' * 100, size=(65, 1))],
[sg.Text('Loss Functions', font=('Helvetica', 15), justification='left')],
[sg.Radio('Cross-Entropy', 'loss', size=(12, 1)), sg.Radio('Logistic', 'loss', default=True, size=(12, 1))],
[sg.Radio('Hinge', 'loss', size=(12, 1)), sg.Radio('Huber', 'loss', size=(12, 1))],
[sg.Radio('Kullerback', 'loss', size=(12, 1)), sg.Radio('MAE(L1)', 'loss', size=(12, 1))],
[sg.Radio('MSE(L2)', 'loss', size=(12, 1)), sg.Radio('MB(L0)', 'loss', size=(12, 1))],
[sg.Submit(), sg.Cancel()]]
window = sg.Window('Machine Learning Front End', layout, font=("Helvetica", 12))
event, values = window.read()
Custom Progress Meter / Progress Bar
Perhaps you don't want all the statistics that the EasyProgressMeter provides and want to create your own progress bar. Use this recipe to do just that.
import PySimpleGUI as sg
# layout the Window
layout = [[sg.Text('A custom progress meter')],
[sg.ProgressBar(1000, orientation='h', size=(20, 20), key='progbar')],
[sg.Cancel()]]
# create the Window
window = sg.Window('Custom Progress Meter', layout)
# loop that would normally do something useful
for i in range(1000):
# check to see if the cancel button was clicked and exit loop if clicked
event, values = window.read(timeout=0)
if event == 'Cancel' or event is None:
break
# update bar with loop value +1 so that bar eventually reaches the maximum
window['progbar'].update_bar(i + 1)
# done with loop... need to destroy the window as it's still open
window.close()
Multiple Columns
A Column is required when you have a tall element to the left of smaller elements.
In this example, there is a Listbox on the left that is 3 rows high. To the right of it are 3 single rows of text and input. These 3 rows are in a Column Element.
To make it easier to see the Column in the window, the Column background has been shaded blue. The code is wordier than normal due to the blue shading. Each element in the column needs to have the color set to match blue background.
import PySimpleGUI as sg
# Demo of how columns work
# GUI has on row 1 a vertical slider followed by a COLUMN with 7 rows
# Prior to the Column element, this layout was not possible
# Columns layouts look identical to GUI layouts, they are a list of lists of elements.
sg.ChangeLookAndFeel('BlueMono')
# Column layout
col = [[sg.Text('col Row 1', text_color='white', background_color='blue')],
[sg.Text('col Row 2', text_color='white', background_color='blue'), sg.Input('col input 1')],
[sg.Text('col Row 3', text_color='white', background_color='blue'), sg.Input('col input 2')]]
layout = [[sg.Listbox(values=('Listbox Item 1', 'Listbox Item 2', 'Listbox Item 3'), select_mode=sg.LISTBOX_SELECT_MODE_MULTIPLE, size=(20,3)), sg.Column(col, background_color='blue')],
[sg.Input('Last input')],
[sg.OK()]]
# Display the Window and get values
event, values = sg.Window('Compact 1-line Window with column', layout).Read()
sg.popup(event, values, line_width=200)
Persistent Window With Text Element Updates
This simple program keep a window open, taking input values until the user terminates the program using the "X" button.
import PySimpleGUI as sg
layout = [ [sg.Txt('Enter values to calculate')],
[sg.In(size=(8,1), key='numerator')],
[sg.Txt('_' * 10)],
[sg.In(size=(8,1), key='denominator')],
[sg.Txt('', size=(8,1), key='output') ],
[sg.Button('Calculate', bind_return_key=True)]]
window = sg.Window('Math', layout)
while True:
event, values = window.read()
if event is not None:
try:
numerator = float(values['numerator'])
denominator = float(values['denominator'])
calc = numerator / denominator
except:
calc = 'Invalid'
window['output'].update(calc)
else:
break
One Element Updating Another - Compound Elements
You can easily build "compound elements" in a single like of code. This recipe shows you how to add a numeric value onto a slider.
import PySimpleGUI as sg
layout = [[sg.Text('Slider Demonstration'), sg.Text('', key='_OUTPUT_')],
[sg.T('0',key='_LEFT_'),
sg.Slider((1,100), key='_SLIDER_', orientation='h', enable_events=True, disable_number_display=True),
sg.T('0', key='_RIGHT_')],
[sg.Button('Show'), sg.Button('Exit')]]
window = sg.Window('Window Title', layout)
while True: # Event Loop
event, values = window.read()
print(event, values)
if event is None or event == 'Exit':
break
window['_LEFT_'].update(values['_SLIDER_'])
window['_RIGHT_'].update(values['_SLIDER_'])
window.close()
Multiple Windows
This recipe is a design pattern for multiple windows where the first window is not active while the second window is showing. The first window is hidden to discourage continued interaction.
"""
PySimpleGUI The Complete Course Lesson 7 - Multiple Windows"""
import PySimpleGUI as sg
# Design pattern 1 - First window does not remain active
layout = [[ sg.Text('Window 1'),],
[sg.Input()],
[sg.Text('', key='_OUTPUT_')],
[sg.Button('Launch 2')]]
win1 = sg.Window('Window 1', layout)
win2_active=False
while True:
ev1, vals1 = win1.Read(timeout=100)
if ev1 is None:
break
win1.['_OUTPUT_'].update(vals1[0])
if ev1 == 'Launch 2' and not win2_active:
win2_active = True
win1.Hide()
layout2 = [[sg.Text('Window 2')], # note must create a layout from scratch every time. No reuse
[sg.Button('Exit')]]
win2 = sg.Window('Window 2', layout2)
while True:
ev2, vals2 = win2.Read()
if ev2 is None or ev2 == 'Exit':
win2.Close()
win2_active = False
win1.UnHide()
break
tkinter Canvas Widget
The Canvas Element is one of the few tkinter objects that are directly accessible. The tkinter Canvas widget itself can be retrieved from a Canvas Element like this:
can = sg.Canvas(size=(100,100))
tkcanvas = can.TKCanvas
tkcanvas.create_oval(50, 50, 100, 100)
While it's fun to scribble on a Canvas Widget, try Graph Element makes it a downright pleasant experience. You do not have to worry about the tkinter coordinate system and can instead work in your own coordinate system.
import PySimpleGUI as sg
layout = [
[sg.Canvas(size=(100, 100), background_color='red', key= 'canvas')],
[sg.T('Change circle color to:'), sg.Button('Red'), sg.Button('Blue')]
]
window = sg.Window('Canvas test', layout)
window.Finalize()
canvas = window['canvas')
cir = canvas.TKCanvas.create_oval(50, 50, 100, 100)
while True:
event, values = window.read()
if event is None:
break
if event == 'Blue':
canvas.TKCanvas.itemconfig(cir, fill="Blue")
elif event == 'Red':
canvas.TKCanvas.itemconfig(cir, fill="Red")
Graph Element - drawing circle, rectangle, etc, objects
Just like you can draw on a tkinter widget, you can also draw on a Graph Element. Graph Elements are easier on the programmer as you get to work in your own coordinate system.
import PySimpleGUI as sg
layout = [
[sg.Graph(canvas_size=(400, 400), graph_bottom_left=(0,0), graph_top_right=(400, 400), background_color='red', key='graph')],
[sg.T('Change circle color to:'), sg.Button('Red'), sg.Button('Blue'), sg.Button('Move')]
]
window = sg.Window('Graph test', layout)
window.Finalize()
graph = window['graph')
circle = graph.DrawCircle((75,75), 25, fill_color='black',line_color='white')
point = graph.DrawPoint((75,75), 10, color='green')
oval = graph.DrawOval((25,300), (100,280), fill_color='purple', line_color='purple' )
rectangle = graph.DrawRectangle((25,300), (100,280), line_color='purple' )
line = graph.DrawLine((0,0), (100,100))
while True:
event, values = window.read()
if event is None:
break
if event is 'Blue':
graph.TKCanvas.itemconfig(circle, fill = "Blue")
elif event is 'Red':
graph.TKCanvas.itemconfig(circle, fill = "Red")
elif event is 'Move':
graph.MoveFigure(point, 10,10)
graph.MoveFigure(circle, 10,10)
graph.MoveFigure(oval, 10,10)
graph.MoveFigure(rectangle, 10,10)
Keypad Touchscreen Entry - Input Element Update
This Recipe implements a Raspberry Pi touchscreen based keypad entry. As the digits are entered using the buttons, the Input Element above it is updated with the input digits.
There are a number of features used in this Recipe including:
- Default Element Size
- auto_size_buttons
- Button
- Dictionary Return values
- Update of Elements in window (Input, Text)
import PySimpleGUI as sg
layout = [[sg.Text('Enter Your Passcode')],
[sg.Input(size=(10, 1), justification='right', key='input')],
[sg.Button('1'), sg.Button('2'), sg.Button('3')],
[sg.Button('4'), sg.Button('5'), sg.Button('6')],
[sg.Button('7'), sg.Button('8'), sg.Button('9')],
[sg.Button('Submit'), sg.Button('0'), sg.Button('Clear')],
[sg.Text(size=(15, 1), font=('Helvetica', 18), text_color='red', key='out')]]
window = sg.Window('Keypad', layout, default_button_element_size=(5,2), auto_size_buttons=False)
# Loop forever reading the window's values, updating the Input field
keys_entered = ''
while True:
event, values = window.read() # read the window
if event is None: # if the X button clicked, just exit
break
if event == 'Clear': # clear keys if clear button
keys_entered = ''
elif event in '1234567890':
keys_entered = values['input'] # get what's been entered so far
keys_entered += event # add the new digit
elif event == 'Submit':
keys_entered = values['input']
window['out'].update(keys_entered) # output the final string
window['input'].update(keys_entered) # change the window to reflect current key string
Matplotlib Window With GUI Window
There are 2 ways to use PySimpleGUI with Matplotlib. Both use the standard tkinter based Matplotlib.
The simplest is when both the interactive Matplotlib window and a PySimpleGUI window are running at the same time.
First the PySimpleGUI window appears giving you 3 options.
Clicking "Plot" will create the Matplotlib window
You can click the "Popup" button in the PySimpleGUI window and you'll see a popup window, proving the your GUI is still alive and operational.
import PySimpleGUI as sg
import matplotlib.pyplot as plt
"""
Simultaneous PySimpleGUI Window AND a Matplotlib Interactive Window
A number of people have requested the ability to run a normal PySimpleGUI window that
launches a MatplotLib window that is interactive with the usual Matplotlib controls.
It turns out to be a rather simple thing to do. The secret is to add parameter block=False to plt.show()
"""
def draw_plot():
plt.plot([0.1, 0.2, 0.5, 0.7])
plt.show(block=False)
layout = [[sg.Button('Plot'), sg.Cancel(), sg.Button('Popup')]]
window = sg.Window('Have some Matplotlib....', layout)
while True:
event, values = window.read()
if event in (None, 'Cancel'):
break
elif event == 'Plot':
draw_plot()
elif event == 'Popup':
sg.popup('Yes, your application is still running')
window.close()
Animated Matplotlib Graph
Use the Canvas Element to create an animated graph. The code is a bit tricky to follow, but if you know Matplotlib then this recipe shouldn't be too difficult to copy and modify.
from tkinter import *
from random import randint
import PySimpleGUI as sg
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, FigureCanvasAgg
from matplotlib.figure import Figure
import matplotlib.backends.tkagg as tkagg
import tkinter as Tk
fig = Figure()
ax = fig.add_subplot(111)
ax.set_xlabel("X axis")
ax.set_ylabel("Y axis")
ax.grid()
layout = [[sg.Text('Animated Matplotlib', size=(40, 1), justification='center', font='Helvetica 20')],
[sg.Canvas(size=(640, 480), key='canvas')],
[sg.Button('Exit', size=(10, 2), pad=((280, 0), 3), font='Helvetica 14')]]
# create the window and show it without the plot
window = sg.Window('Demo Application - Embedding Matplotlib In PySimpleGUI', layout)
window.Finalize() # needed to access the canvas element prior to reading the window
canvas_elem = window['canvas')
graph = FigureCanvasTkAgg(fig, master=canvas_elem.TKCanvas)
canvas = canvas_elem.TKCanvas
dpts = [randint(0, 10) for x in range(10000)]
# Our event loop
for i in range(len(dpts)):
event, values = window.read(timeout=20)
if event == 'Exit' or event is None:
exit(69)
ax.cla()
ax.grid()
ax.plot(range(20), dpts[i:i + 20], color='purple')
graph.draw()
figure_x, figure_y, figure_w, figure_h = fig.bbox.bounds
figure_w, figure_h = int(figure_w), int(figure_h)
photo = Tk.PhotoImage(master=canvas, width=figure_w, height=figure_h)
canvas.create_image(640 / 2, 480 / 2, image=photo)
figure_canvas_agg = FigureCanvasAgg(fig)
figure_canvas_agg.draw()
tkagg.blit(photo, figure_canvas_agg.get_renderer()._renderer, colormode=2)
Tight Layout with Button States
Saw this example layout written in tkinter and liked it so much I duplicated the interface. It's "tight", clean, and has a nice dark look and feel.
This Recipe also contains code that implements the button interactions so that you'll have a template to build from.
In other GUI frameworks this program would be most likely "event driven" with callback functions being used to communicate button events. The "event loop" would be handled by the GUI engine. If code already existed that used a call-back mechanism, the loop in the example code below could simply call these callback functions directly based on the button text it receives in the window.read call.
import PySimpleGUI as sg
"""
Demonstrates using a "tight" layout with a Dark theme.
Shows how button states can be controlled by a user application. The program manages the disabled/enabled
states for buttons and changes the text color to show greyed-out (disabled) buttons
"""
sg.ChangeLookAndFeel('Dark')
sg.SetOptions(element_padding=(0,0))
layout = [[sg.T('User:', pad=((3,0),0)), sg.OptionMenu(values = ('User 1', 'User 2'), size=(20,1)), sg.T('0', size=(8,1))],
[sg.T('Customer:', pad=((3,0),0)), sg.OptionMenu(values=('Customer 1', 'Customer 2'), size=(20,1)), sg.T('1', size=(8,1))],
[sg.T('Notes:', pad=((3,0),0)), sg.In(size=(44,1), background_color='white', text_color='black')],
[sg.Button('Start', button_color=('white', 'black'), key='Start'),
sg.Button('Stop', button_color=('white', 'black'), key='Stop'),
sg.Button('Reset', button_color=('white', 'firebrick3'), key='Reset'),
sg.Button('Submit', button_color=('white', 'springgreen4'), key='Submit')]
]
window = sg.Window("Time Tracker", layout, default_element_size=(12,1), text_justification='r', auto_size_text=False, auto_size_buttons=False,
default_button_element_size=(12,1))
window.Finalize()
window['Stop'].update(disabled=True)
window['Reset'].update(disabled=True)
window['Submit'].update(disabled=True)
recording = have_data = False
while True:
event, values = window.read()
print(event)
if event is None:
exit(69)
if event is 'Start':
window['Start'].update(disabled=True)
window['Stop'].update(disabled=False)
window['Reset'].update(disabled=False)
window['Submit'].update(disabled=True)
recording = True
elif event is 'Stop' and recording:
window['Stop'].update(disabled=True)
window['Start'].update(disabled=False)
window['Submit'].update(disabled=False)
recording = False
have_data = True
elif event is 'Reset':
window['Stop'].update(disabled=True)
window['Start'].update(disabled=False)
window['Submit'].update(disabled=True)
window['Reset'].update(disabled=False)
recording = False
have_data = False
elif event is 'Submit' and have_data:
window['Stop'].update(disabled=True)
window['Start'].update(disabled=False)
window['Submit'].update(disabled=True)
window['Reset'].update(disabled=False)
recording = False
Password Protection For Scripts
You get 2 scripts in one.
Use the upper half to generate your hash code. Then paste it into the code in the lower half. Copy and paste lower 1/2 into your code to get password protection for your script without putting the password into your source code.
import PySimpleGUI as sg
import hashlib
'''
Create a secure login for your scripts without having to include your password in the program. Create an SHA1 hash code for your password using the GUI. Paste into variable in final program
1. Choose a password
2. Generate a hash code for your chosen password by running program and entering 'gui' as the password
3. Type password into the GUI
4. Copy and paste hash code Window GUI into variable named login_password_hash
5. Run program again and test your login!
'''
# Use this GUI to get your password's hash code
def HashGeneratorGUI():
layout = [[sg.T('Password Hash Generator', size=(30,1), font='Any 15')],
[sg.T('Password'), sg.In(key='password')],
[sg.T('SHA Hash'), sg.In('', size=(40,1), key='hash')],
]
window = sg.Window('SHA Generator', layout, auto_size_text=False, default_element_size=(10,1),
text_justification='r', return_keyboard_events=True, grab_anywhere=False)
while True:
event, values = window.read()
if event is None:
exit(69)
password = values['password']
try:
password_utf = password.encode('utf-8')
sha1hash = hashlib.sha1()
sha1hash.update(password_utf)
password_hash = sha1hash.hexdigest()
window['hash'].update(password_hash)
except:
pass
# ----------------------------- Paste this code into your program / script -----------------------------
# determine if a password matches the secret password by comparing SHA1 hash codes
def PasswordMatches(password, hash):
password_utf = password.encode('utf-8')
sha1hash = hashlib.sha1()
sha1hash.update(password_utf)
password_hash = sha1hash.hexdigest()
if password_hash == hash:
return True
else:
return False
login_password_hash = '5baa61e4c9b93f3f0682250b6cf8331b7ee68fd8'
password = sg.popup_get_text('Password', password_char='*')
if password == 'gui': # Remove when pasting into your program
HashGeneratorGUI() # Remove when pasting into your program
exit(69) # Remove when pasting into your program
if PasswordMatches(password, login_password_hash):
print('Login SUCCESSFUL')
else:
print('Login FAILED!!')
Desktop Floating Toolbar
Hiding your windows commmand window
For this and the Time & CPU Widgets you may wish to consider using a tool or technique that will hide your Windows Command Prompt window. I recommend the techniques found on this site:
http://www.robvanderwoude.com/battech_hideconsole.php
At the moment I'm using the technique that involves wscript and a script named RunNHide.vbs. They are working beautifully. I'm using a hotkey program and launch by using this script with the command "python.exe insert_program_here.py". I guess the next widget should be one that shows all the programs launched this way so you can kill any bad ones. If you don't properly catch the exit button on your window then your while loop is going to keep on working while your window is no longer there so be careful in your code to always have exit explicitly handled.
Floating toolbar
This is a cool one! (Sorry about the code pastes... I'm working in it)
Impress your friends at what a tool-wizard you are by popping a custom toolbar that you keep in the corner of your screen. It stays on top of all your other windows.
You can easily change colors to match your background by changing a couple of parameters in the code.
import PySimpleGUI as sg
import subprocess
import os
import sys
"""
Demo_Toolbar - A floating toolbar with quick launcher One cool PySimpleGUI demo. Shows borderless windows, grab_anywhere, tight button layout
You can setup a specific program to launch when a button is clicked, or use the Combobox to select a .py file found in the root folder, and run that file. """
ROOT_PATH = './'
def Launcher():
def print(line):
window['output'].update(line)
sg.ChangeLookAndFeel('Dark')
namesonly = [f for f in os.listdir(ROOT_PATH) if f.endswith('.py') ]
sg.SetOptions(element_padding=(0,0), button_element_size=(12,1), auto_size_buttons=False)
layout = [[sg.Combo(values=namesonly, size=(35,30), key='demofile'),
sg.Button('Run', button_color=('white', '#00168B')),
sg.Button('Program 1'),
sg.Button('Program 2'),
sg.Button('Program 3', button_color=('white', '#35008B')),
sg.Button('EXIT', button_color=('white','firebrick3'))],
[sg.T('', text_color='white', size=(50,1), key='output')]]
window = sg.Window('Floating Toolbar', layout, no_titlebar=True, keep_on_top=True)
# ---===--- Loop taking in user input (events) --- #
while True:
(event, value) = window.read()
if event == 'EXIT' or event is None:
break # exit button clicked
if event == 'Program 1':
print('Run your program 1 here!')
elif event == 'Program 2':
print('Run your program 2 here!')
elif event == 'Run':
file = value['demofile']
print('Launching %s'%file)
ExecuteCommandSubprocess('python', os.path.join(ROOT_PATH, file))
else:
print(event)
def ExecuteCommandSubprocess(command, *args, wait=False):
try:
if sys.platwindow == 'linux':
arg_string = ''
for arg in args:
arg_string += ' ' + str(arg)
sp = subprocess.Popen(['python3' + arg_string, ], shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
else:
sp = subprocess.Popen([command, list(args)], shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
if wait:
out, err = sp.communicate()
if out:
print(out.decode("utf-8"))
if err:
print(err.decode("utf-8"))
except: pass
if __name__ == '__main__':
Launcher()
Desktop Floating Widget - Timer
This is a little widget you can leave running on your desktop. Will hopefully see more of these for things like checking email, checking server pings, displaying system information, dashboards, etc
.
Much of the code is handling the button states in a fancy way. It could be much simpler if you don't change the button text based on state.
import sys
if sys.version_info[0] >= 3:
import PySimpleGUI as sg
else:
import PySimpleGUI27 as sg
import time
"""
Timer Desktop Widget Creates a floating timer that is always on top of other windows You move it by grabbing anywhere on the window Good example of how to do a non-blocking, polling program using SimpleGUI Can be used to poll hardware when running on a Pi
While the timer ticks are being generated by PySimpleGUI's "timeout" mechanism, the actual value
of the timer that is displayed comes from the system timer, time.time(). This guarantees an
accurate time value is displayed regardless of the accuracy of the PySimpleGUI timer tick. If
this design were not used, then the time value displayed would slowly drift by the amount of time
it takes to execute the PySimpleGUI read and update calls (not good!)
NOTE - you will get a warning message printed when you exit using exit button.
It will look something like: invalid command name \"1616802625480StopMove\"
"""
# ---------------- Create Form ----------------
sg.ChangeLookAndFeel('Black')
sg.SetOptions(element_padding=(0, 0))
layout = [[sg.Text('')],
[sg.Text('', size=(8, 2), font=('Helvetica', 20), justification='center', key='text')],
[sg.Button('Pause', key='button', button_color=('white', '#001480')),
sg.Button('Reset', button_color=('white', '#007339'), key='Reset'),
sg.Exit(button_color=('white', 'firebrick4'), key='Exit')]]
window = sg.Window('Running Timer', layout, no_titlebar=True, auto_size_buttons=False, keep_on_top=True, grab_anywhere=True)
# ---------------- main loop ----------------
current_time = 0
paused = False
start_time = int(round(time.time() * 100))
while (True):
# --------- Read and update window --------
if not paused:
event, values = window.read(timeout=10)
current_time = int(round(time.time() * 100)) - start_time
else:
event, values = window.read()
if event == 'button':
event = window[event).GetText()
# --------- Do Button Operations --------
if event is None or event == 'Exit': # ALWAYS give a way out of program
break
if event is 'Reset':
start_time = int(round(time.time() * 100))
current_time = 0
paused_time = start_time
elif event == 'Pause':
paused = True
paused_time = int(round(time.time() * 100))
element = window['button')
element.update(text='Run')
elif event == 'Run':
paused = False
start_time = start_time + int(round(time.time() * 100)) - paused_time
element = window['button')
element.update(text='Pause')
# --------- Display timer in window --------
window['text'].update('{:02d}:{:02d}.{:02d}'.format((current_time // 100) // 60,
(current_time // 100) % 60,
current_time % 100))
Desktop Floating Widget - CPU Utilization
Like the Timer widget above, this script can be kept running. You will need the package psutil installed in order to run this Recipe.
The spinner changes the number of seconds between reads. Note that you will get an error message printed when exiting because the window does not have have a titlebar. It's a known problem.
import PySimpleGUI as sg
import psutil
# ---------------- Create Window ----------------
sg.ChangeLookAndFeel('Black')
layout = [[sg.Text('')],
[sg.Text('', size=(8, 2), font=('Helvetica', 20), justification='center', key='text')],
[sg.Exit(button_color=('white', 'firebrick4'), pad=((15, 0), 0)),
sg.Spin([x + 1 for x in range(10)], 1, key='spin')]]
window = sg.Window('Running Timer', layout, no_titlebar=True, auto_size_buttons=False, keep_on_top=True,
grab_anywhere=True)
# ---------------- main loop ----------------
while (True):
# --------- Read and update window --------
event, values = window.read(timeout=0)
# --------- Do Button Operations --------
if event is None or event == 'Exit':
break
try:
interval = int(values['spin'])
except:
interval = 1
cpu_percent = psutil.cpu_percent(interval=interval)
# --------- Display timer in window --------
window['text'].update(f'CPU {cpu_percent:02.0f}%')
# Broke out of main loop. Close the window.
window.close()
Menus
Menus are nothing more than buttons that live in a menu-bar. When you click on a menu item, you get back a "button" with that menu item's text, just as you would had that text been on a button.
Menu's are defined separately from the GUI window. To add one to your window, simply insert sg.Menu(menu_layout). The menu definition is a list of menu choices and submenus. They are a list of lists. Copy the Recipe and play with it. You'll eventually get when you're looking for.
If you double click the dashed line at the top of the list of choices, that menu will tear off and become a floating toolbar. How cool! To enable this feature, set the parameter tearoff=True in your call to sg.Menu()
import PySimpleGUI as sg
sg.ChangeLookAndFeel('LightGreen')
sg.SetOptions(element_padding=(0, 0))
# ------ Menu Definition ------ #
menu_def = [['File', ['Open', 'Save', 'Exit' ]],
['Edit', ['Paste', ['Special', 'Normal', ], 'Undo'], ],
['Help', 'About...'], ]
# ------ GUI Defintion ------ #
layout = [
[sg.Menu(menu_def, )],
[sg.Output(size=(60, 20))]
]
window = sg.Window("Windows-like program", layout, default_element_size=(12, 1), auto_size_text=False, auto_size_buttons=False,
default_button_element_size=(12, 1))
# ------ Loop & Process button menu choices ------ #
while True:
event, values = window.read()
if event == None or event == 'Exit':
break
print('Button = ', event)
# ------ Process menu choices ------ #
if event == 'About...':
sg.popup('About this program', 'Version 1.0', 'PySimpleGUI rocks...')
elif event == 'Open':
filename = sg.popup_get_file('file to open', no_window=True)
print(filename)
Graphing with Graph Element
Use the Graph Element to draw points, lines, circles, rectangles using your coordinate systems rather than the underlying graphics coordinates.
In this example we're defining our graph to be from -100, -100 to +100,+100. That means that zero is in the middle of the drawing. You define this graph description in your call to Graph.
import math
import PySimpleGUI as sg
layout = [[sg.Graph(canvas_size=(400, 400), graph_bottom_left=(-105,-105), graph_top_right=(105,105), background_color='white', key='graph', tooltip='This is a cool graph!')],]
window = sg.Window('Graph of Sine Function', layout, grab_anywhere=True).Finalize()
graph = window['graph')
# Draw axis
graph.DrawLine((-100,0), (100,0))
graph.DrawLine((0,-100), (0,100))
for x in range(-100, 101, 20):
graph.DrawLine((x,-3), (x,3))
if x != 0:
graph.DrawText( x, (x,-10), color='green')
for y in range(-100, 101, 20):
graph.DrawLine((-3,y), (3,y))
if y != 0:
graph.DrawText( y, (-10,y), color='blue')
# Draw Graph
for x in range(-100,100):
y = math.sin(x/20)*50
graph.DrawCircle((x,y), 1, line_color='red', fill_color='red')
event, values = window.read()
Tabs
Tabs bring not only an extra level of sophistication to your window layout, they give you extra room to add more elements. Tabs are one of the 3 container Elements, Elements that hold or contain other Elements. The other two are the Column and Frame Elements.
import PySimpleGUI as sg
tab1_layout = [[sg.T('This is inside tab 1')]]
tab2_layout = [[sg.T('This is inside tab 2')],
[sg.In(key='in')]]
layout = [[sg.TabGroup([[sg.Tab('Tab 1', tab1_layout, tooltip='tip'), sg.Tab('Tab 2', tab2_layout)]], tooltip='TIP2')],
[sg.Button('Read')]]
window = sg.Window('My window with tabs', layout, default_element_size=(12,1))
while True:
event, values = window.read()
print(event,values)
if event is None: # always, always give a way out!
break
Creating a Windows .EXE File
It's possible to create a single .EXE file that can be distributed to Windows users. There is no requirement to install the Python interpreter on the PC you wish to run it on. Everything it needs is in the one EXE file, assuming you're running a somewhat up to date version of Windows.
Installation of the packages, you'll need to install PySimpleGUI and PyInstaller (you need to install only once)
pip install PySimpleGUI
pip install PyInstaller
To create your EXE file from your program that uses PySimpleGUI, my_program.py, enter this command in your Windows command prompt:
pyinstaller -wF my_program.py
You will be left with a single file, my_program.exe, located in a folder named dist under the folder where you executed the pyinstaller command.
That's all... Run your my_program.exe file on the Windows machine of your choosing.
"It's just that easy."
(famous last words that screw up just about anything being referenced)
Your EXE file should run without creating a "shell window". Only the GUI window should show up on your taskbar.