PySimpleGUI/DemoPrograms/Demo_Script_Parameters.py

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#!/usr/bin/env python
import sys
if sys.version_info[0] >= 3:
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import PySimpleGUI as sg
else:
import PySimpleGUI27 as sg
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'''
Quickly add a GUI to your script!
This simple script shows a 1-line-GUI addition to a typical Python command line script.
Previously this script accepted 1 parameter on the command line. When executed, that
parameter is read into the variable fname.
The 1-line-GUI shows a form that allows the user to browse to find the filename. The GUI
stores the result in the variable fname, just like the command line parsing did.
'''
if len(sys.argv) == 1:
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event, (fname,) = sg.Window('My Script').Layout([[sg.T('Document to open')],
[sg.In(), sg.FileBrowse()],
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[sg.CloseButton('Open'), sg.CloseButton('Cancel')]]).Read()
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else:
fname = sys.argv[1]
if not fname:
sg.Popup("Cancel", "No filename supplied")
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raise SystemExit("Cancelling: no filename supplied")