how to check if input is not an integer in python code example

Example 1: how to know if a input is a interger in python

whatever = input("Pick an integer > ")
    try:
        whatever_as_an_integer = int(whatever)
        print("That was an integer.")

    except ValueError:
        print("That is not an integer.")

Example 2: check integer number python

N.is_integer()

Example 3: python is integer

(1.23).is_integer() # Returns false