Latest updates from Tony

ProgrammingClassExamples/MacOS versions/6a PSG (search linear and binary).py

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+#PySimple examples (v 3.9)
+#Tony Crewe
+#Oct 2018 MacOs
+
+import PySimpleGUI as sg
+
+    
+sg.SetOptions(background_color = 'Grey',
+            element_background_color = 'Grey',
+            text_element_background_color = 'Grey',
+              font= ('Calibri', 14, 'bold'))
+
+layout =[[sg.Text('Search Demo', font =('Calibri', 18, 'bold')), sg.ReadButton('Show Names')],
+[sg.Text('',size = (14, 11),relief=sg.RELIEF_SOLID,font = ('Calibri', 12), background_color ='White',key = '_display1_'),
+ sg.Text('',size = (14, 11),relief=sg.RELIEF_SOLID,font = ('Calibri', 12), background_color ='White',key = '_display2_')],
+         [sg.Text('_'*35,font = ('Calibri', 16))],
+         [sg.InputText(size = (10,1), key = '_linear_'), sg.InputText(size = (11,1), key = '_binary_')],
+          [sg.ReadButton('Linear Search', size = (11,1)), sg.ReadButton('Binary Search', size = (11,1))],
+         ]
+window = sg.Window('Search Demo').Layout(layout)
+
+#names for Demo, could be loaded from a file
+names = ['Roberta', 'Kylie', 'Jenny', 'Helen',
+        'Andrea', 'Meredith','Deborah','Pauline',
+        'Belinda', 'Wendy']
+
+sorted_names = ['Andrea','Belinda','Deborah','Helen',
+               'Jenny','Kylie','Meredith','Pauline',
+            'Roberta','Wendy']
+
+#function to display list
+def display_list(list, display):
+    names = ''
+    for l in list:                #add list elements with new line
+        names = names + l + '\n'
+    window.FindElement(display).Update(names)
+    
+#Linear Search - no need for Ordered list
+def linear_search():
+    l = names[:]
+    found = False
+    for l in l:
+        if l == value['_linear_']:             #Check each value
+            found = True
+            window.FindElement('_display1_').Update('Linear search\n' + l + ' found.')
+            break
+    if not found:
+        window.FindElement('_display1_').Update(value['_linear_'] + ' was \nNot found')
+
+#Binary Search - only works for ordered lists      
+def binary_search():
+    l = sorted_names[:]                                 
+    lo = 0
+    hi = len(l)-1
+    #Start with found is False
+    found = False                  
+    while lo <= hi:
+        #Start in middle
+        mid = (lo + hi) //2
+        #get the value from the search box
+        if l[mid] == value['_binary_']:    
+            window.FindElement('_display2_').Update('Binary search\n' + l[mid] + ' found.')
+            #If found display name and stop
+            found = True           
+            break                   
+        elif l[mid] < value['_binary_']:
+            #Search in top half
+            lo = mid + 1            
+        else:
+            #Search in lower half
+            hi = mid - 1
+    #If we get to end  - display not found
+    if not found:                   
+        window.FindElement('_display2_').Update(value['_binary_'] + ' was \nNot found')
+
+while True:
+    button, value = window.Read() 
+
+    if button is not None:
+        #show names - unordered and sorted
+        if button == 'Show Names':  
+            display_list(names,'_display1_')
+            display_list(sorted_names, '_display2_')
+        if button == 'Linear Search':
+            linear_search()
+        if button == 'Binary Search':
+            binary_search()
+    else:
+        break  
+