问题：如何使用zlib模块来进行压缩解压了？
解答:
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:
复制代码 代码示例:
import zlib
message = 'witch which has which witches wrist watch'
compres
sed = zlib.compress(message)
decompressed = zlib.decompress(compressed)
print 'original:', repr(message)
print 'compressed:', repr(compressed)
print 'decompressed:', repr(decompressed)
输出结果：
复制代码 代码示例:
original: 'witch which has which witches wrist watch'
compressed: 'xx9c+xcf,IxceP(xcfxc8x04x92x19x89xc5PV9H4x15xc8+xca,.Q(Ox04xf2x00D?x0fx89'
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，使用zlib.compressobj和zlib.decompressobj对文件进行压缩、解压缩的例子:
复制代码 代码示例:
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())
