python-tutorials/programs/backup_ver3.py

import os
import time

# 1. The files and directories to be backed up are
# specified in a list.
# Example on Windows:
# source = ['"C:\\My Documents"', 'C:\\Code']
# Example on Mac OS X and Linux:
source = ['/Users/swa/notes']
# Notice we had to use double quotes inside the string
# for names with spaces in it.

# 2. The backup must be stored in a
# main backup directory
# Example on Windows:
# target_dir = 'E:\\Backup'
# Example on Mac OS X and Linux:
target_dir = '/Users/swa/backup'
# Remember to change this to which folder you will be using

# Create target directory if it is not present
if not os.path.exists(target_dir):
    os.mkdir(target_dir) # make directory

# 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 + os.sep + 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 --> ')
# Check if a comment was entered
if len(comment) == 0:
    target = today + os.sep + now + '.zip'
else:
    target = today + os.sep + now + '_' +
        comment.replace(' ', '_') + '.zip'

# Create the subdirectory if it isn't already there
if not os.path.exists(today):
    os.mkdir(today)
    print 'Successfully created directory', today

# 5. We use the zip command to put the files in a zip archive
zip_command = "zip -r {0} {1}".format(target,
                                      ' '.join(source))

# Run the backup
print "Zip command is:"
print zip_command
print "Running:"
if os.system(zip_command) == 0:
    print 'Successful backup to', target
else:
    print 'Backup FAILED'