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

if the length of the encoded string is the times of 4, it can be decoded

base64.encodestring("whatever you say").strip().__len__() % 4 == 0

so, you just need to check if the string can match something like above, then it won't throw any exception(I Guess =.=)

if len(the_base64string.strip()) % 4 == 0:
    # then you can just decode it anyway
    base64.decodestring(the_base64string)