代码:

# -*- coding: utf-8 -*-
from binascii import a2b_hex

def hex2bin_1(s):
    ss = []
    # 按照2个一组转化为str数组
    ss = [s[i:i+2] for i in range(0, len(s), 2)]
    return bytes(bytearray(int(x, 16) for x in ss))


def hex2bin_2(s):
    return bytes(bytearray.fromhex(s))


def hex2bin_3(s):
    return a2b_hex(s)


if __name__ == '__main__':
    s = '1ab2'
    print(hex2bin_1(s))
    print(hex2bin_2(s))
    print(hex2bin_3(s))

其中第一个和第二个基本是一样的, 所有三个大同小异