题目：
https://cryptopals.com/sets/1/challenges/1
转码，hex到base64
x = "0x49276d206b696c6c696e6720796f757220627261696e206c696b65206120706f69736f6e6f7573206d757368726f6f6d"
bx = bytes.fromhex(x)
base64.b64encode(bx)
原文：https://www.cnblogs.com/xuesu/p/12000255.html