Python USES zlib to compress and extract strings

This article illustrates how python can compress and extract strings through zlib. Share with you for your reference. The specific implementation method is as follows:

Use zlib.press to compress strings. Decompress can be used to decompress strings. The following

#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

 
Demonstration code 2:

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) # The output 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'

If we want to decompress a string, we can use zlib.compressobj and zlib.decompressobj to decompress the file

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())

I hope this article has helped you with your Python programming.