Use the python program to clean up the windows garbage

preface

As you may know, some "junk" files will be generated after using windows system for a long time. Some of these files are temporary files of the program, some are operation records or logs, etc. The accumulation of garbage over time leads to the reduction of available space and excessive file fragmentation, which affects the running speed of the system.

The Mac and Linux systems do not have such problems, so they only apply to windows

Knowledge summary

Some cache files can improve the execution speed of the program, such as caching cookie, using record recent, prereading prefetch, and so on. So cleaning up temporary files doesn't mean your system will run faster, and sometimes slower.

What are the main junk files and folders on windows computers?

System disk %system%

[temporary document (*.tmp)]

[temporary file (*._mp)]

[log file (*.log)]

[temporary help document (*.gid)]

[disk check file (*.chk)]

[temporary backup file (*.old)]

[Excel backup file (*.xlk)]

[temporary backup file (*.bak)]

User directory %userprofile% under folder

cookies COOKIE 】 【 \ *. *

【 document usage record 】 recent\*.*

【IE temporary document 】 Temporary Internet Files\*.*

【 temporary file folder 】 Temp\*.*

Windows directory %windir% under folder

【 preread data folder 】 prefetch\*.*

[temporary document] temp\*.*

Get file address

Operation requires the os module, such as getting the working directory:

import os
print os.getcwd() # 'E:\\PythonSource\\leanr_py'

Switch working directory:

os.chdir('d://wamp')
print os.getcwd() # 'd:\\wamp'

Get system disk character:

os.environ['systemdrive'] # 'C:'

Get user directory:

os.environ['userprofile'] # 'C:\\Users\\Administrator'

Get Windows directory:

os.environ['windir'] # 'C:\\Windows'

Directory traversal

To traverse a folder, you need to use it os.walk(top,topdown=True,onerror=None)

The parameter top represents the path to the top-level directory that needs to be traversed. The default value of the topdown parameter is "True" to indicate that you first return the files in the top-level directory and then traverse the files in the subdirectory. When the value of topdown is "False", it means that the files in the subdirectory are first traversed, and then the files in the top-level directory are returned. The parameter onerror defaults to "None", indicating an error that ignores the file traversal. If it is not empty, a custom function is provided with an error message to continue the traversal or an exception is thrown to abort the traversal. Return value: the function returns a tuple with three elements. The three elements are: the path name for each traversal, the subdirectory list for the path, and the list of files under the directory.

for roots, dirs, files in os.walk('d://wamp', topdown=False)
 # roots  Folder path,  dirs  List of folders in this directory,  files File list 
 print roots # d://wamp
 print dirs # ['bin', 'www', 'alias']
 print files # ['wampmanage.conf', '1.txt']

Determine if the file is garbage

os.path.splitext() You can cut file names

extension = os.path.splitext(r'aaa\bbb\ccc.ddd') # ('aaa\\bbb\\ccc', '.ddd')
if extension[1] in ['.tmp', '.bak']:
 print ' It's a junk file '

Delete the file

Deleting files and deleting folders call different functions.

#  Delete the file 
os.remove('d:temporary/test/test.txt')

#  Delete folder 
os.rmdir('d:temporary/test/empty')

os.rmdir can only delete empty folders; if the folder is not empty, an error will be reported. So you should use:

shutil.rmtree('d:/dir1/dir2/aaa')

When the file is running or protected and the current account does not have sufficient permissions, an error is reported.

Finally, the collation and deletion function is:

def del_dir_or_file(root):
 try:
  if os.path.isfile(root):
   #  Delete the file 
   os.remove(root)
   print 'file: ' + root + ' removed'
  elif os.path.isdir(root):
   #  Delete folder 
   shutil.rmtree(root)
   print 'directory: ' + root + ' removed'
 except WindowsError:
  print 'failure: ' + root + " can't remove"

Get file size

os.chdir('d://wamp')
print os.getcwd() # 'd:\\wamp'

0

Complete the program

Note: because the file deletion operation is involved, please be sure to confirm the code again and again before starting work.

Be sure to confirm!!

Be sure to confirm!!

Be sure to confirm!!

os.chdir('d://wamp')
print os.getcwd() # 'd:\\wamp'

1

conclusion

Recently I have been looking at some content of qt interface. Can be combined to do a graphical interface program. The above is the whole content of this article, I hope the content of this article to your study or work can bring 1 definite help, if you have questions you can leave a message to communicate.