Bdtjtk

a beginner here, I was hoping to open a new window after I logged the correct entry by trying to put import filename.py but it won't show after the tm.showinfo. I don't know what function that will make it happen at the same time it will closed or quit my login window.

I've tried my previous way of doing it to call a command and making a function for it but now I'm totally confused about it,

from tkinter import * 

import tkinter.messagebox as tm



class adminlog(Frame):

    def __init__(self, master):

        super().__init__(master)



        self.label_username = Label(self, text="Username")

        self.label_password = Label(self, text="Password")

        self.entry_username = Entry(self)

        self.entry_password = Entry(self, show="*")



        self.label_username.grid(row=0, sticky=E)

        self.label_password.grid(row=1, sticky=E)

        self.entry_username.grid(row=0, column=1)

        self.entry_password.grid(row=1, column=1)



        self.logbtn = Button(self, text="Login as Admin", command=self.lg_admin)

        self.logbtn.grid(columnspan=2)



        self.pack()



    def lg_admin(self):

        un = self.entry_username.get()

        ps = self.entry_password.get()

        if un == "admin" and ps == "pito":

            tm.showinfo("Login Info", "Login Successfully")

            import adminpage

        else:

            tm.showerror("Login Error", "Incorrect password or username")



admin = Tk()

a = adminlog(admin)

admin.mainloop()

I expect that after I am logged in, then a new window will open after the tm.showinfo shows.

It really depends upon your choice and feel. I will give you two methods and let you decide.

Disclaimer : I prefer the first method.

It is not a good practice to create two Tk() windows in the same program. What you can do is have one main window and configure it as and when you want. Here for example, the function clear_widgets() clears the login page and shows the next page.

import tkinter as tk

import tkinter.messagebox as tm



class adminlog(tk.Tk):

    def __init__(self):

        super().__init__()

        tk.Label(self, text="Username").grid(row=0, sticky="e")

        tk.Label(self, text="Password").grid(row=1, sticky="e")

        self.entry_username = tk.Entry(self)

        self.entry_password = tk.Entry(self, show="*")



        self.entry_username.grid(row=0, column=1)

        self.entry_password.grid(row=1, column=1)



        logbtn = tk.Button(self, text="Login as Admin", command=self.lg_admin)

        logbtn.grid(columnspan=2)



    def adminpage(self):

        self.clear_widgets()

        tk.Label(self, text='Hello Admin !!', bg='brown', fg='white').grid(row=0, column=1, padx=20, pady=20)



    def clear_widgets(self):

        for widget in self.winfo_children():

            widget.destroy()



    def lg_admin(self):

        un = self.entry_username.get()

        ps = self.entry_password.get()

        if un == "admin" and ps == "pito":

            tm.showinfo("Login Info", "Login Successfully")

            self.adminpage()

        else:

            tm.showerror("Login Error", "Incorrect password or username")



adminlog().mainloop()

If you really want another window and can't do without it, you should use a Toplevel. Here is a demonstration.

import tkinter as tk

import tkinter.messagebox as tm



class adminlog(tk.Tk):

    def __init__(self):

        super().__init__()

        tk.Label(self, text="Username").grid(row=0, sticky="e")

        tk.Label(self, text="Password").grid(row=1, sticky="e")

        self.entry_username = tk.Entry(self)

        self.entry_password = tk.Entry(self, show="*")



        self.entry_username.grid(row=0, column=1)

        self.entry_password.grid(row=1, column=1)



        logbtn = tk.Button(self, text="Login as Admin", command=self.lg_admin)

        logbtn.grid(columnspan=2)



    def adminpage(self):

        adp = tk.Toplevel(self)

        tk.Label(adp, text='Hello Admin !!', bg='brown', fg='white').grid(row=0, column=1, padx=20, pady=20)



    def lg_admin(self):

        un = self.entry_username.get()

        ps = self.entry_password.get()

        if un == "admin" and ps == "pito":

            tm.showinfo("Login Info", "Login Successfully")

            self.adminpage()

        else:

            tm.showerror("Login Error", "Incorrect password or username")



adminlog().mainloop()

Here you can see, the login window won't go away (if it does, it will take the Toplevel with it also). So, I would recommend you to use the first method.