Tkinter登录窗口点击登录报错：缺少1个必需位置参数window

Hey there, let's break down what's going on with your code and fix that error!

The Root Cause #

When you set command=enter for your Login button, Tkinter calls the enter function without passing any arguments by default. But your enter function is defined to require a window parameter—hence the TypeError: enter() missing 1 required positional argument: 'window' message.

Quick Fix: Use lambda to Pass the Argument #

The simplest way to pass the window parameter to your enter function is to use a lambda function as the command. Lambda acts as a small wrapper that calls enter with the correct argument when the button is clicked.

Here's how to modify the button line:

btn=tk.Button(text='Login',command=lambda: enter(window))

Full Modified Code #

Here's your complete code with the fix applied, plus a few small improvements to make the new window work properly:

import tkinter as tk

def enter(window):
    if ipt.get()=='admin' and ipt1.get() == 'admin':
        window.destroy()
        # Create and configure the new logged-in window
        new_window = tk.Tk()
        new_window.title("Logged In Successfully")
        new_window.geometry('1000x600+260+100')
        new_window.resizable(0, 0)
        # Start the event loop for the new window
        new_window.mainloop()

window=tk.Tk()
window.title("Login")
window.geometry('200x80')
window.resizable(0,0)

lbl = tk.Label(text='Name:')
lbl.grid(row=0,column=0)
lbl1=tk.Label(text='Password:')
lbl1.grid(row=1,column=0)

ipt=tk.Entry()
ipt.grid(row=0,column=1)
ipt1=tk.Entry(show='*')
ipt1.grid(row=1,column=1)

# Use lambda to pass the login window to the enter function
btn=tk.Button(text='Login',command=lambda: enter(window))
btn.grid(row=2,column=1)

window.mainloop()

Key Notes: #

• I renamed the new window variable to new_window to avoid confusion with the original login window.
• Added new_window.mainloop() to start the event loop for the new window—without this, the new window would close immediately after creation.
• Added window titles to both windows so you can easily distinguish between them.

内容的提问来源于stack exchange，提问作者Tan Joo Hui