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《简明Python教程》中模块那一章的作业，用zipfile模块完成文件备份

压缩文件代码：

import os

import time

import zipfile

def compressZip(sourcePath, targetPath):

'''

:param sourcePath:待压缩文件所在文件目录

:param targetPath:目标文件目录

:return:null

'''

if not os.path.exists(targetPath):

os.mkdir(targetPath)

today = targetPath + os.sep + time.strftime('%Y%m%d')

now = time.strftime('%H%M%S')

target = today + os.sep + now + '.zip'

if not os.path.exists(today):

os.mkdir(today)

print('success to create directory ', today)

tarZip = zipfile.ZipFile(target, 'w', zipfile.ZIP_STORED)

fileList = []

for root,dirs,files in os.walk(sourcePath):

for file in files:

fileList.append(os.path.join(root, file))

print(fileList)

for filename in fileList:

tarZip.write(filename, filename[len(sourcePath):])

tarZip.close()

print('compress file successfully!')

解压代码：

def unzip(sourceFile, targetPath):

'''

:param sourceFile: 待解压zip路径

:param targetPath: 目标文件目录

:return:

'''

file = zipfile.ZipFile(sourceFile, 'r')

file.extractall(targetPath)

print('success to unzip file!')

测试代码：

sourceFile = 'D:\\Python\\backup\\20180919\\140951.zip'

source = "D:\\Python\\source"

target_dir = 'D:\\Python\\backup'

compressZip(source, target_dir)

unzip(sourceFile, target_dir)