GUI 程序无法运行 PYTHON

Question

I was trying to make a simple GUI based game that has a button having the text CLICK ME .Whenever the user clicks on the button the total number clicks are displayed on the button.

Here is my code

from Tkinter import *

    class Application(Frame):

        def __init__(self,master):
            Frame.__init__(self,master)
            self.grid()
            self.bttn_click = 0
            self.create_widget()

        def create_widget(self):
            self.bttn = Button(self)
            self.bttn["text"] = "Total Clicks = 0"
            self.bttn["command"] = self.update_count()
            self.bttn.grid()

        def update_count(self):
            self.bttn_click += 1
            self.bttn["text"] = "Total Clicks = " + str(self.bttn_click)

    #main

    root = Tk()
    root.geometry("900x700")
    root.title("Click Counter")

    app = Application(root)

    root.mainloop()

Answer 1

Please read it from the official documentation . In there, the first "Hello World" Example has almost the same code as you do.

The command self.bttn["command"] = self.update_count() assigns the return value of def update_count(self) to your button command.

If you think to know what the result of some action should be, you could always use a print statement afterwards to verify what your assignment did.

self.bttn["command"] = self.update_count()
print(self.bttn["command"])

What exactly is the issue and where does it come from?

in the code line of yours mentioned above, you are immediately calling self.update_count and not assigning the function to be called everytime the button is pressed.