I am a python beginner. Try to make a new button to close the window. I got the error message:
Exception in Tkinter callback
Traceback (most recent call last): File
"/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py",
line 1536, in call
return self.func(*args) File "tk_cp_successful.py", line 138, in buttonPushed
self.root.destroy() File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py",
line 1859, in destroy
self.tk.call('destroy', self._w) TclError: can't invoke "destroy" command: application has been destroyed
class LoginPage(tk.Frame):
def __init__(self, parent, controller):
self.controller = controller
self.root = tk.Tk()
global entry_1
global entry_2
tk.Frame.__init__(self, parent)
label = tk.Label(self, text="Welcome to VISA Login Page",fg="blue")
label.pack(pady=10,padx=10)
label_1 = Label(self, text="Username")
label_1.pack()
label_2 = Label(self, text="Password")
label_2.pack()
entry_1 = Entry(self)
entry_1.pack()
entry_2 = Entry(self, show="*")
entry_2.pack()
label_1.grid(row=0, sticky=E)
label_1.pack()
label_2.grid(row=1, sticky=E)
label_2.pack()
entry_1.grid(row=0, column=1)
entry_1.pack()
entry_2.grid(row=1, column=1)
entry_2.pack()
checkbox = Checkbutton(self, text="Keep me logged in")
checkbox.grid(columnspan=2)
checkbox.pack()
logbtn = Button(self, text="Login", command = self._login_btn_clickked)
logbtn.grid(columnspan=2)
logbtn.pack()
myButton = Button(self, text="Exit",command = self.buttonPushed)
myButton.pack()
def buttonPushed(self):
self.root.destroy()
def _login_btn_clickked(self):
#print("Clicked")
username = entry_1.get()
password = entry_2.get()
#print(username, password)
if username == "test" and password == "test":
#box.showinfo("Login info", "Welcome Tester")
button1 = ttk.Button(self, text="Please click, Welcome to login!!!",
command=lambda: self.controller.show_frame(StartPage))
button1.pack()
else:
box.showerror("Login failed", "Incorrect username")
Best Answer
There are many problems with your code
grid()
andpack()
import tkinter as tk
orfrom tkinter import *
, i.e.self.root = tk.Tk()
(import as tk
) orlabel_1 = Label(self, text="Username")
(from tkinter import *
)mainloop
in programIn any case, the following modified code runs so hopefully it will help.