本文實例講述了python通過zlib實現壓縮與解壓字符串的方法。分享給大家供大家參考。具體實現方法如下：
使用zlib.compress可以壓縮字符串。使用zlib.decompress可以解壓字符串。如下
復制代碼
代碼如下:
#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
import zlib
s = "hello word, 00000000000000000000000000000000"
print len(s)
c = zlib.compress(s)
print len(c)
d =? zlib.decompress(c)
print d
?
示范代碼2:
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代碼如下:
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) #輸出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'
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) #輸出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'
如果我們要對字符串進行解壓可以使用zlib.compressobj和zlib.decompressobj對文件進行壓縮解壓
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代碼如下:
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, '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())
??? 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())
希望本文所述對大家的Python程序設計有所幫助。
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