【python】使用zlib进行压缩解压

【python】使用zlib进行压缩解压

A:如何使用zlib模块来进行压缩解压了?
Q:
1.使用zlib.compress可以压缩字符串。使用zlib.decompress可以解压字符串。
压缩解压字符串示范代码:
import zlib
message = 'witch which has which witches wrist watch'
compressed = zlib.compress(message)
decompressed = zlib.decompress(compressed)
print 'original:' , repr(message)
print 'compressed:' , repr(compressed)
print 'decompressed:' , repr(decompressed)
输出
original: 'witch which has which witches wrist watch'
compressed: 'x\x9c+\xcf,I\xceP(\xcf\xc8\x04\x92\x19\x89\xc5PV9H4\x15\xc8+\xca,.Q(O\x04\xf2\x00D?\x0f\x89'
decompressed: 'witch which has which witches wrist watch'
2.使用zlib.compressobj和zlib.decompressobj比较适合用于对文件进行压缩解压。
以下定义的两个函数可以做为使用zlib.compressobj和zlib.decompressobj对文件进行压缩解压的例子:
def compress(infile, dst, level=9):
    infile = open(infile,
'rb' )
    dst = open(dst,
'wb' )
    compress = zlib.compressobj(level)
    data = infile.read(1024)
    while data:
        dst.write(compress.compress(data))
        data = infile.read(1024)
    dst.write(compress.flush())
def decompress(infile, dst):
    infile = open
(infile, 'rb' )
    dst = open(dst, 'wb' )
    decompress = zlib.decompressobj()
    data = infile.read(1024)
    while data:
        dst.write(decompress.decompress(data))
        data = infile.read(1024)
    dst.write(decompress.flush())

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