使用类定义时Tkinter窗口无法打开的问题求助

Hey there, let's get that login window up and running! I found a handful of small but critical mistakes in your code that are preventing the window from opening. Here's a breakdown of the issues and the corrected code:

Key Problems in Your Original Code #

• Incorrect assignment in __init__: You wrote self.root-root which is a subtraction operation, not an assignment. It should be self.root = root to store the main window reference in your class.
• Invalid geometry string: Tkinter's geometry() method uses a lowercase x to separate width and height, not an asterisk *. So change "1550*800+0+0" to "1550x800+0+0".
• Wrong main window creation: root=tk() won't work—tk is the module, you need to call the Tk() constructor to create a window: root = tk.Tk().
• Incorrect mainloop() call: Your Login_window instance (app) doesn't have a mainloop() method. You need to call this method on the main window instance (root).

Corrected Code #

from tkinter import *
from tkinter import ttk
import tkinter as tk

class Login_window:
    def __init__(self, root):
        self.root = root  # Fixed assignment
        self.root.title("Login")
        self.root.geometry("1550x800+0+0")  # Fixed geometry format

if __name__ == "__main__":
    root = tk.Tk()  # Correct window creation
    app = Login_window(root)
    root.mainloop()  # Call mainloop on the root window

Just run this corrected code, and your login window should pop up as expected!

内容的提问来源于stack exchange，提问作者umar_sk77