Check if a string is encoded in base64 using Python

Question

Is there a good way to check if a string is encoded in base64 using Python?

Answer 1

I know I'm almost 8 years late but you can use a regex expression thus you can verify if a given input is BASE64.

import re

encoding_type = 'Encoding type: '
base64_encoding = 'Base64'


def is_base64():
    element = input("Enter encoded element: ")
    expression = "^([A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}==)?$"

    matches = re.match(expression, element)

    if matches:
        print(f"{encoding_type + base64_encoding}")
    else:
        print("Unknown encoding type.")


is_base64()