windows平臺下實現《簡明python教程》第10章的文件備份示例四

 參考一《簡明python教程》：http://old.sebug.net/paper/python/index.html

1，《簡明python教程》第10章的文件備份示例四中，需要用到zip命令，而windows下是沒有，下載了7z-zip代替，同時將7z路徑添加到環境變量中。因此文件拷貝命令需要根據7z.exe命令行參數作相應修改；

    

#1. the file and directories to be backed up are specified in a list.
#source = r'C:\Users\YU\Documents\NotePad++'
source = r'C:\Users\YU\Documents\NotePad++\*'

#2.The backup must be stored in a main backup directory
target_dir = 'G:\\Yu\\NppBackup\\'
	
#5.We use the zip command to put the files in a zip archive
zip_command = "7z a -tzip %s %s" % (target,source)

 2，windows下python表示文件路徑的兩種方式

    在上面代碼中有兩種表述文件路徑的方式：a.用自然字符串表示，在字符串前加‘r'，不使用轉義字符，如source文件路徑；b.使用轉義字符，如target_dir文件路徑

3，python使用mkdir函數出現錯誤 WindowsError:[Error 3]

    參考二：python使用mkdir函數出現錯誤WindowsError:[Error 3]的解決辦法

    原因是’mkdir‘只能創建單層文件夾，如果創建嵌套文件夾則需要使用’makedirs‘

4，完整代碼

#!/usr/bin/python
# _*_ coding: utf-8 _*_

import os
import time

#1. the file and directories to be backed up are specified in a list.
#source = r'C:\Users\YU\Documents\NotePad++'
source = r'C:\Users\YU\Documents\NotePad++\*'

#2.The backup must be stored in a main backup directory
target_dir = 'G:\\Yu\\NppBackup\\'

#3.the files are backed up into a zip file
#4.the current day is the name of the subdirectory in the main directory
today = target_dir + time.strftime('%Y%m%d')
#the current time is the name of the zip archive
now = time.strftime('%H%M%S')
target = today + os.sep + now + '.zip'

#Create the subdirectory if it isn't already there
if not os.path.exists(today):
	#os.mkdir(today) #make single level directory
	os.makedirs(today) #make multiple levels directory
	print 'Successfully created directory',today
	
#5.We use the zip command to put the files in a zip archive
zip_command = "7z a -tzip %s %s" % (target,source)

#run the backup
if os.system(zip_command) == 0:
	print 'Successful backup to',target
else:
	print 'Backup Failed'
	
#End of file

運行結果：