September Morn Update

Task/Simple-windowed-application/Python/simple-windowed-application-1.py

@@ -1,13 +1,29 @@
-from Tkinter import Tk, Label, Button
+from functools import partial
 
-def update_label():
-    global n
-    n += 1
-    l["text"] = "Number of clicks: %d" % n
+import tkinter as tk
 
-w = Tk()
-n = 0
-l = Label(w, text="There have been no clicks yet")
-l.pack()
-Button(w, text="click me", command=update_label).pack()
-w.mainloop()
+
+def on_click(label: tk.Label,
+             counter: tk.IntVar) -> None:
+    counter.set(counter.get() + 1)
+    label["text"] = f"Number of clicks: {counter.get()}"
+
+
+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()