MineSweeper in Python (With tkinter)

Question

I just debugged most of my MineSweeper Code in Python, but there is an issue with the game functions that determine a win or loss. If I win, it does not show the desired message box and confirm a win. If I lose, it will show an error message that says messagebox (a tkinter built in function) is undefined.

This is my code for the game:

from tkinter import *
import random

...

def CheckWin(self):
    '''Checks if player won'''
    doneList = []
    for key in self.cells.keys():
        if self.cells[key].clicked == True and self.cells[key].value != 9:
            doneList.append(self.cells[key])
    if len(doneList) == int(height)*int(width)-int(numBombs):
        messagebox.showinfo('Minesweeper','Congratulations -- you won!', parent=self)
        self.winner = True

def CheckLoss(self):
    '''Checks if player lost'''
    self.loser = True
    self.flagTrack['text'] = '0'
    messagebox.showerror('Minesweeper','KABOOM! You lose.', parent=self)
    for key in self.cells.keys():
        if self.cells[key].value == 9:
            self.cells[key].flagged = False
            self.cells[key].expose()

Answer 1

If I lose, it will show an error message that says messagebox (a tkinter built in function) is undefined.

messagebox is not a function in tkinter , it's a module . And doing from pkg import * does not import submodules of pkg , just things defined directly in pkg .

So, you probably want to do this:

from tkinter import messagebox

(By the way, this is one of the reasons from foo import * can be confusing, but not the only one. That's why it's not recommended, except for playing around in the interactive interpreter, or in a few special cases.)