integer in a string python check code example

Example 1: python test if string is int

'16'.isdigit()
>>>True

'3.14'.isdigit()
>>>False

'Some text'.isdigit()
>>>False

Example 2: 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")