Answer
The pack method expects a 'side' argument to be passed in as one of the named constants defined in the tkinter module. However, the code you provided button.pack(LEFT) is passing in LEFT as an argument, which is not defined in the tkinter module. This will result in an AttributeError.
Work Step by Step
To correctly specify the side argument, you need to use the named constant LEFT. So the correct code would be:
from tkinter import *
button.pack(side=LEFT)
This will properly align the button to the left side of the parent window using the pack manager.
