zipfile的压缩和解压缩

zipfile是python提供的内置的压缩方法

可以对zip文件进行压缩和解压缩

压缩：

zf = ZipFile("out.zip", "w", mode=zipfile.ZIP_STORED)

zf.write("文件全路径", "归档文件全路径(也就是写入压缩包的相对路径)")

说明：

zipfile.ZIP_STORED是默认压缩方式，其实只是存储，并不进行内容压缩

如果要使用压缩，必须要import zlib库才可以

如下：

import zipfile
try:
import zlib
mode= zipfile.ZIP_DEFLATED
except:
mode= zipfile.ZIP_STORED

zip= zipfile.ZipFile('zipfilename', 'w', mode)
zip.write(item)
zip.close()

再来查看官方文档：

zipfile.

ZIP_STORED

The numeric constant for an uncompressed archive member.

zipfile.

ZIP_DEFLATED

The numeric constant for the usual ZIP compression method. This requires the

zlib

module. No other compression methods are currently supported.

难怪我压缩发现文件越来越大了

但是zipfile用的默认压缩算法是zlib，目前仅支持这个。

解压缩：

解压缩就比较简单了

ZipFile.

extract

(member[,
path[, pwd]])

Extract a member from the archive to the current working directory; member must be its full name or a

ZipInfo

object). Its file information is extracted as accurately as possible.
path specifies a different directory to extract to. member can be a filename or a

ZipInfo

object.
pwd is the password used for encrypted files.

Returns the normalized path created (a directory or new file).

New in version 2.6.

Note
If a member filename is an absolute path, a drive/UNC sharepoint and leading (back)slashes will be stripped, e.g.:

///foo/bar

becomes

foo/bar

on Unix, and

C:\foo\bar

becomes

foo\bar

on Windows. And all

".."

components in a member filename will be removed, e.g.:

../../foo../../ba..r

becomes

foo../ba..r

. On Windows illegal characters (

:

,

<

,

>

,

|

,

"

,

?

, and

*

) replaced by underscore (

_

).

ZipFile.

extractall

([path[,
members[, pwd]]])

Extract all members from the archive to the current working directory. path specifies a different directory to extract to.
members is optional and must be a subset of the list returned by

namelist()

. pwd is the password used for encrypted files.

说明了读文档的能力还是不够细！要加强！！！