zlib.decompress(data,15 32)应该自动检测是否有gzip数据或zlib数据.

zlib.decompress(data,15 16)应该工作,如果gzip和barf如果zlib.

这里是Python 2.7.1,创建一个gz文件,读回来,并解压缩它：

>>> import gzip, zlib

>>> f = gzip.open('foo.gz', 'wb')

>>> f.write(b"hello world")

11

>>> f.close()

>>> c = open('foo.gz', 'rb').read()

>>> c

'\x1f\x8b\x08\x08\x14\xf4\xdcM\x02\xfffoo\x00\xcbH\xcd\xc9\xc9W(\xcf/\xcaI\x01\x00\x85\x11J\r\x0b\x00\x00\x00'

>>> ba = bytearray(c)

>>> ba

bytearray(b'\x1f\x8b\x08\x08\x14\xf4\xdcM\x02\xfffoo\x00\xcbH\xcd\xc9\xc9W(\xcf/\xcaI\x01\x00\x85\x11J\r\x0b\x00\x00\x00')

>>> zlib.decompress(ba, 15+32)

Traceback (most recent call last):

File "", line 1, in

TypeError: must be string or read-only buffer, not bytearray

>>> zlib.decompress(bytes(ba), 15+32)

'hello world'

>>>

Python 3.x的使用将非常相似.

基于您正在运行Python 2.2.1的注释更新.

叹.这甚至不是Python 2.2的最后一个版本.反正继续上面创建的foo.gz文件：

Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on win32

Type "help", "copyright", "credits" or "license" for more information.

>>> strobj = open('foo.gz', 'rb').read()

>>> strobj

'\x1f\x8b\x08\x08\x14\xf4\xdcM\x02\xfffoo\x00\xcbH\xcd\xc9\xc9W(\xcf/\xcaI\x01\x00\x85\x11J\r\x0b\x00\x00\x00'

>>> import zlib

>>> zlib.decompress(strobj, 15+32)

Traceback (most recent call last):

File "", line 1, in ?

zlib.error: Error -2 while preparing to decompress data

>>> zlib.decompress(strobj, 15+16)

Traceback (most recent call last):

File "", line 1, in ?

zlib.error: Error -2 while preparing to decompress data

# OK, we can't use the back door method. Plan B: use the

# documented approach i.e. gzip.GzipFile with a file-like object.

>>> import gzip, cStringIO

>>> fileobj = cStringIO.StringIO(strobj)

>>> gzf = gzip.GzipFile('dummy-name', 'rb', 9, fileobj)

>>> gzf.read()

'hello world'

# Success. Now let's assume you have an array.array object-- which requires

# premeditation; they aren't created accidentally!

# The following code assumes subtype 'B' but should work for any subtype.

>>> import array, sys

>>> aaB = array.array('B')

>>> aaB.fromfile(open('foo.gz', 'rb'), sys.maxint)

Traceback (most recent call last):

File "", line 1, in ?

EOFError: not enough items in file

#### Don't panic, just read the fine manual

>>> aaB

array('B', [31, 139, 8, 8, 20, 244, 220, 77, 2, 255, 102, 111, 111, 0, 203, 72, 205, 201, 201, 87, 40, 207, 47, 202, 73, 1, 0, 133, 17, 74, 13, 11, 0, 0, 0])

>>> strobj2 = aaB.tostring()

>>> strobj2 == strobj

1 #### means True

# You can make a str object and use that as above.

# ... or you can plug it directly into StringIO:

>>> gzip.GzipFile('dummy-name', 'rb', 9, cStringIO.StringIO(aaB)).read()

'hello world'