python check if string is digit code example

Example 1: python check if number

if type(variable) == int or type(variable) == float:
    isNumber = True

Example 2: test if character is number python string

>>> 'A'.isdigit()
False
>>> '1'.isdigit()
True

Example 3: how to check if digit in int python

s = set(str(4059304593))
print('2' in s)