Are you interested in the practical application of the Python programming language? Do you understand its powerful practical functions? If you are particularly interested in these things, you can browse the following articles to learn about them. The following is a detailed introduction of the article.
Python tutorial
There are some notes in the code of backup script-version 4 in example 10.4.
- #!/usr/bin/python
- # Filename: backup_ver4.py
- import os
- import time
- # 1. The files and directories to be backed up are
specified in a list.
- source = [‘/home/swaroop/byte’, ‘/home/swaroop/bin’]
- # If you are using Windows, use source =
[r'C:\Documents', r'D:\Work'] or something
like that
- # 2. The backup must be stored in a main
backup directory
- target_dir = ‘/mnt/e/backup/’ # Remember to
change this to what you will be using
- # 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’)
- # Take a comment from the user to create the name
of the zip file
- comment = raw_input(‘Enter a comment –> ‘)
- if len(comment) == 0: # check if a comment was entered
- target = today + os.sep + now + ‘.zip’
- else:
- target = today + os.sep + now + ‘_’ + \
- comment.replace(‘ ‘, ‘_’) + ‘.zip’
- # Notice the backslash!
- # Create the subdirectory if it isn’t already there
- if not os.path.exists(today):
- os.mkdir(today) # make directory
- print ‘Successfully created directory’, today
- # 5. We use the zip command (in Unix/Linux) to put
the files in a zip archive
- zip_command = "zip -qr ‘%s’ %s" % (target, ‘
‘.join(source))
- # Run the backup
- if os.system(zip_command) == 0:
- print ‘Successful backup to’, target
- else:
- print ‘Backup FAILED’
For the Python tutorial code, the article mentions "I also want to use the tar command to replace the zip command for some optimizations. One advantage of this is that when you use the tar and gzip commands in combination, backup will be faster and smaller. If you want to use this document in windows, winzipcan easily process these .tar.gz files. The tar command is available by default in most Linux/Unix systems. Windows users can also download and install it.
The command string will now be:
- tar = ‘tar -cvzf %s %s -X /home/swaroop/excludes.txt’
% (target, ‘ ‘.join(srcdir))
It must be supplemented that the command after installing LibArchive for Windows users is bsdtar. To use the-z option, you must also install the gzip software.
In the code
- target = today + os.sep + now + ‘.zip’
Change
- target = today + os.sep + now + ‘.tar.gz’
Use
- bsdtar -cvzf %s %s -X /home/swaroop/excludes.txt’ % (target, ‘ ‘.join(source))
The original English version has not replaced the zip content with tar. We suggest using zipfile and tarfile In the Python standard library to rewrite ver5. The above is an introduction to the Python tutorial. I hope you will get something.