python3 移植编码问题

例子

网易云音乐API分析

从中取出相关代码

import md5

def encrypted_id(id):
    byte1 = bytearray('3go8&$8*3*3h0k(2)2')
    byte2 = bytearray(id)
    byte1_len = len(byte1)
    for i in xrange(len(byte2)):
        byte2[i] = byte2[i]^byte1[i%byte1_len]
    m = md5.new()
    m.update(byte2)
    result = m.digest().encode('base64')[:-1]
    result = result.replace('/', '_')
    result = result.replace('+', '-')
    return result


encrypted_id(1222)

尝试移值这段到python3上

运行时出现第一个错误 ImportError: No module named ‘md5’

修改: import md5

from hashlib import md5

并将md5 相关的改成

m = md5()

出现第二个问题 byte1 = bytearray(‘3go8&$833h0k(2)2’) TypeError: string argument without an encoding

byte1 = bytearray(‘3go8&$833h0k(2)2’) byte2 = bytearray(id)

修改,加上编码

byte1 = bytearray(‘3go8&$833h0k(2)2’, ‘utf-8’) byte2 = bytearray(id, ‘utf-8’)

出现第三个问题: NameError: name ‘xrange’ is not defined

原因分析,差不多都改成iter模式了

for i in xrange(len(byte2)):

修改成»>

for i in range(len(byte2)):

出现第四个问题!

File “netease_api.py”, line 81, in encrypted_id result = m.digest().encode(‘base64’)[:-1] AttributeError: ‘bytes’ object has no attribute ‘encode’

编base64的都放到 base64上了

修改为

result = base64.b64encode(m.digest()).decode()

总结

python2 > python3 md5 -> hashlib.md5 xrange -> range base64