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7.9 数据压缩
Python还支持常用数据的打包和压缩。主要涉及到的模块式 zlib,gzip, bz2,zipfile and tarfile.
>>> import zlib
>>> s = b’witch which has which witches wrist watch’
>>> len(s)
41
>>> t = zlib.compress(s)
>>> len(t)
37
>>> zlib.decompress(t)
b’witch which has which witches wrist watch’
>>> zlib.crc32(s)
226805979