在python中，zlib模块是用来压缩或者解压缩数据，以便保存和传输。
它是其他压缩工具的基础。
分享二个例子，供大家参考。
第一个是用来压缩数据并保存到本地磁盘：
复制代码 代码示例:
#!/usr/bin/python
#-*-coding:UTF-8 -*-
import zlib
import sys
compressor = zlib.compressobj(1)
filein = raw_input('please input the filename: ')
fileout = raw_input('please input the compres
sed filename: ')
try:
fdin = open(filein,'r')
except IOError:
print 'open %s failed!!!',filein
sys.exit(1)
fdout = open(fileout,'wb')
while True:
block = fdin.read(64)
if not block :
break
compressed = compressor.compress(block)
fdout.write(compressed)
remaining = compressor.flush()
fdout.write(remaining)
print 'compressed: %s' % filein
第二段，是用来解压数据并保存到本地磁盘：
复制代码 代码示例:
#!/usr/bin/python
#-*- coding UTF-8 -*-
import zlib
import sys
filein = raw_input('please input the compressed filename: ')
fileout = raw_input('please input the output filename: ')
try:
fdin = open(filein,'rb')
except IOError:
print 'open %s failed!!!' % filein
sys.exit(1)
fdout = open(fileout,'w')
decompressor = zlib.decompressobj()
while True:
block = fdin.read(128)
if not block:
break
to_de = decompressor.unconsumed_tail + block
decompressed = decompressor.decompress(to_de)
fdout.write(decompressed)
remaining = decompressor.flush()
fdout.write(remaining)
print 'decompressed'
实验过程：
复制代码 代码示例:
[root@localhost tmp]# tar -cf etc.tar /etc
tar: Removing leading `/' from member names
[root@localhost tmp]# ls
etc.tar ipvsadm-1.24 keepalived-1.1.19 zlib_compressobj.py zlib_decompressobj.py
[root@localhost tmp]# ./zlib_compressobj.py
please input the filename: /tmp/etc.tar
please input the compressed filename: /tmp/etc.tar.zlib
compressed: /tmp/etc.tar
[root@localhost tmp]# du -h etc.tar
19M etc.tar
[root@localhost tmp]# du -h etc.tar.zlib
6.6M etc.tar.zlib
[root@localhost tmp]# ./zlib_decompressobj.py
please input the compressed filename: /tmp/etc.tar.zlib
please input the output filename: /tmp/etc.tar1
decompressed
[root@localhost tmp]# du -h etc.tar1
19M etc.tar1
[root@localhost tmp]# tar -xf etc.tar1
[root@localhost tmp]# ls
etc etc.tar1 ipvsadm-1.24 zlib_compressobj.py
etc.tar etc.tar.zlib keepalived-1.1.19 zlib_decompressobj.py
[root@localhost tmp]# cd etc
[root@localhost etc]# du -sh .
21M .
[root@localhost etc]# du -sh /etc
21M /etc
