How do I get a windows current size using Tkinter? code example

Example 1: get size of window tkinter

# Where w is a widget:
w.winfo_height()
w.winfo_width()

Example 2: python tkinter window size

#import statement
from tkinter import *
#create GUI Tk() variable
gui = Tk()
#set window size
gui.geometry("widthxheight")