How to check if input is int 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: how to check if a input is an integer 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 3: python check if input is a number

user_input = input("Enter something:")

if type(user_input) == int:
    return user_input
else:
    print("Not a number")