python通过zlib实现压缩与解压字符串的方法

本文实例讲述了python通过zlib实现压缩与解压字符串的方法。分享给大家供大家参考。具体实现方法如下：

使用zlib.compress可以压缩字符串。使用zlib.decompress可以解压字符串。如下

复制代码 代码如下:

#coding=utf-8
import zlib
s = "hello word,00000000000000000000000000000000"
print len(s)
c = zlib.compress(s)
print len(c)
d =  zlib.decompress(c)
print d

 
示范代码2:

复制代码 代码如下:

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: 'xx9c+xcf,IxceP(xcfxc8x04x92x19x89xc5PV9H4x15xc8+xca,.Q(Ox04xf2x00D?x0fx89'
decompressed: 'witch which has which witches wrist watch'

如果我们要对字符串进行解压可以使用zlib.compressobj和zlib.decompressobj对文件进行压缩解压

复制代码 代码如下:

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,'wb')
    decompress = zlib.decompressobj()
    data = infile.read(1024)
    while data:
        dst.write(decompress.decompress(data))
        data = infile.read(1024)
    dst.write(decompress.flush())

希望本文所述对大家的Python程序设计有所帮助。