Simple windowed application: Difference between revisions

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 ==={{libheader|Tkinter}}===
-<lang python>from Tkinter import Tk, Label, Button
+<lang python>from functools import partial
+import tkinter as tk
-def update_label():
-    global n
-    n += 1
-    l["text"] = "Number of clicks: %d" % n
-w = Tk()
+def on_click(label: tk.Label,
-n = 0
+             counter: tk.IntVar) -> None:
-l = Label(w, text="There have been no clicks yet")
+    counter.set(counter.get() + 1)
-l.pack()
+    label["text"] = f"Number of clicks: {counter.get()}"
-Button(w, text="click me", command=update_label).pack()
-w.mainloop()</lang>
+def main():
+    window = tk.Tk()
+    label = tk.Label(master=window,
+                     text="There have been no clicks yet")
+    label.pack()
+    counter = tk.IntVar()
+    update_counter = partial(on_click,
+                             label=label,
+                             counter=counter)
+    button = tk.Button(master=window,
+                       text="click me",
+                       command=update_counter)
+    button.pack()
+    window.mainloop()
+if __name__ == '__main__':
+    main()
+</lang>
 The same in OO manner:
-<lang python>#!/usr/bin/env python
+<lang python>import tkinter as tk
-from Tkinter import Button, Frame, Label, Pack
-class ClickCounter(Frame):
+class ClickCounter(tk.Frame):
-    def click(self):
-        self.count += 1
+    def __init__(self, master=None):
+        super().__init__(master)
-        self.label['text'] = 'Number of clicks: %d' % self.count
+        tk.Pack.config(self)
+        self.label = tk.Label(self, text='There have been no clicks yet')
-    def createWidgets(self):
-        self.label = Label(self, text='here have been no clicks yet')
         self.label.pack()
-        self.button = Button(self, text='click me', command=self.click)
+        self.button = tk.Button(self,
+                                text='click me',
+                                command=self.click)
         self.button.pack()
-    def __init__(self, master=None):
-        Frame.__init__(self, master)
-        Pack.config(self)
-        self.createWidgets()
         self.count = 0
+    def click(self):
-if __name__=="__main__":
+        self.count += 1
-    ClickCounter().mainloop()</lang>
+        self.label['text'] = f'Number of clicks: {self.count}'
+if __name__ == "__main__":
+    ClickCounter().mainloop()
+</lang>
 ==={{libheader|PyQt}}===