Python checkio "IP Network: Route Summarization"解决方案

def checkio(data):    bins = ["".join(bin(int(x))[2:].zfill(8) for x in line.split(".")) for line in data]    mask = 0    binary = ""    for i, v in enumerate(zip(*bins), 0):        if len(set(v)) > 1:            mask = i            break        else:            binary += v[0]    binary += ("0" * (32 - mask))    return ".".join(str(int(binary[i:i+8], 2)) for i in range(0, 32, 8)) + "/" + str(mask)from itertools import takewhile, chaindef checkio(adds):    binint = lambda strn: '{:0=8b}'.format(int(strn))    binseqs = (''.join(map(binint, a.split('.'))) for a in adds)    iscommon = lambda binset: len(binset) == 1    prefix = ''.join(chain(*takewhile(iscommon, map(set, zip(*binseqs)))))    filled = '{:0<32}'.format(prefix)    summary = '.'.join(str(int(filled[i: i + 8], 2)) for i in range(0, 32, 8))    return '{}/{}'.format(summary, len(prefix))