我正在使用 Python3,当用户按下登录按钮时,我试图将用户在用户名和密码框中输入的内容传递给登录功能。登录功能应该只是将用户名标签打包到 GUI 上。
代码:
import tkinter
from tkinter import *
import sys
def login_gui():
global login_window
global studentid_entry_login
usr_login = StringVar()
pwd_login = StringVar()
login_window=tkinter.Tk()
login_window.title("Login")
login_window.geometry("200x200+500+300")
username_label_login = tkinter.Label(login_window, text="Username:").pack()
username_entry_login = tkinter.Entry(login_window, textvariable=usr_login).pack()
password_label_login = tkinter.Label(login_window, text="\nPassword:").pack()
password_entry_login = tkinter.Entry(login_window, textvariable=pwd_login).pack()
button_login = tkinter.Button(login_window, text="Login", command = login).pack()
login_window.mainloop()
def login():
username = usr_login.get()
label1 = tkinter.Label(login_window, text=username).pack()
return
login_gui()
追溯:
Traceback (most recent call last):
File "C:/Python33/Folder/tkinter-test.py", line 25, in <module>
login_gui()
File "C:/Python33/Folder/tkinter-test.py", line 8, in login_gui
usr_login = StringVar()
File "C:\Python33\lib\tkinter\__init__.py", line 254, in __init__
Variable.__init__(self, master, value, name)
File "C:\Python33\lib\tkinter\__init__.py", line 182, in __init__
self._tk = master.tk
AttributeError: 'NoneType' object has no attribute 'tk'