Shell tool
Hello all,
I’ve just started trying to use Python to automate
Windows system administration. I wrote my first (long-winded, amateurish)
shell-tool to os.path.walk through a directory structure and delete files older
than 2 days. (Keeps users from cluttering some temporary storage space). It
works fine, except that it does not delete the empty directories. Any hints?
"""Delete files older than AGING constant
using os.path.walk"""
import sys, os, time
AGING = 172800 # Default 2 days
def lister(dummy, dirName, filesInDir):
print '[' + dirName + ']'
for fname in filesInDir:
path =
os.path.join(dirName, fname)
if not
os.path.isdir(path):
print path, time.ctime(os.stat(path).st_mtime), fileage(path), prune(path)
purge(path)
def fileage(file):
curtime = time.time()
modtime = os.stat(file).st_mtime
age = curtime - modtime
return age
def prune(file):
if fileage(file) > AGING:
return
("T")
else:
return
("File should not be deleted")
def purge(file):
if prune(file) == "T":
os.remove(file)
if __name__ == '__main__':
os.path.walk(sys.argv[1], lister, None)
--Adam Getchell
RE: Shell tool
Looks like you're only deleting files, with the "if not
os.path.isdir(path)" line. But beyond that, I think there's a problem
with the order in which os.path.walk will call your lister. walk() will
call lister from top-down, whereas a delete type function like this needs to
walk from bottom up.
Problem simpler to write your own little recursive
thingy.
Or,
you could cheat.
Take out the directory check mentioned
above
Attempt to delete all files, dir or file
alike.
Catch and ignore the 'directory not empty'
errors
Keep looping from the top until there's nothing
left.
-Original Message-From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Adam
GetchellSent: Sunday, May 12, 2002 1:50 AMTo:
[EMAIL PROTECTED]Subject: Shell
tool
Hello all,
I’ve just started trying to use
Python to automate Windows system administration. I wrote my first
(long-winded, amateurish) shell-tool to os.path.walk through a directory
structure and delete files older than 2 days. (Keeps users from cluttering
some temporary storage space). It works fine, except that it does not delete
the empty directories. Any hints?
"""Delete files older than AGING
constant using os.path.walk"""
import sys, os,
time
AGING = 172800 # Default 2
days
def lister(dummy, dirName,
filesInDir):
print '[' +
dirName + ']'
for fname in
filesInDir:
path = os.path.join(dirName, fname)
if not os.path.isdir(path):
print path, time.ctime(os.stat(path).st_mtime), fileage(path),
prune(path)
purge(path)
def
fileage(file):
curtime =
time.time()
modtime =
os.stat(file).st_mtime
age = curtime -
modtime
return
age
def prune(file):
if
fileage(file) > AGING:
return ("T")
else:
return ("File should not be deleted")
def purge(file):
if prune(file)
== "T":
os.remove(file)
if __name__ ==
'__main__':
os.path.walk(sys.argv[1], lister, None)
--Adam
Getchell
Re: Shell tool
I only skimmed you message, but I couldn't see
os.removedirs in it:
>>> help('os.removedirs')Help on
function removedirs:
removedirs(name)
removedirs(path) -> None
Super-rmdir; remove a leaf directory and empty all
intermediate ones. Works like rmdir except that, if
the leaf directory is successfully removed, directories
corresponding to rightmost path segments will be pruned
way until either the whole path is consumed or an error
occurs. Errors during this latter phase are ignored
-- they generally mean that a directory was not empty.
>>>
Hope that helps.
GBU
Matthew Sherborne
Re: Shell tool
Adam, Richard, Microsoft seems to have changed the email standards
again; do you think you could send in plain text?
Thanks, I appreciate it.
(yes, my email client reads html, but it can't cope with this.)
> "AG" == Adam Getchell <[EMAIL PROTECTED]> writes:
AG>
AG>
AG>
AG>
AG>
AG>
AG>
AG>
AG>
AG>
AG> Hello all,
AG>
AG> I’ve just started trying to use Python to automate
AG> Windows system administration. I wrote my first (long-winded, amateurish)
AG> shell-tool to os.path.walk through a directory structure and delete files older
AG> than 2 days. (Keeps users from cluttering some temporary storage space). It
AG> works fine, except that it does not delete the empty directories. Any
hints?
AG>
AG> """Delete files older than AGING constant
AG> using os.path.walk"""
AG> import sys, os, time
AG>
AG> AGING = 172800 # Default 2 days
AG>
AG> def lister(dummy, dirName, filesInDir):
AG> print '[' + dirName + ']'
AG> for fname in filesInDir:
AG> path =
AG> os.path.join(dirName, fname)
AG> if not
AG> os.path.isdir(path):
AG>
AG> print path, time.ctime(os.stat(path).st_mtime), fileage(path),
prune(path)
AG>
AG> purge(path)
AG>
AG> def fileage(file):
AG> curtime = time.time()
AG> modtime =
os.stat(file).st_mtime
AG> age = curtime - modtime
AG> return age
AG>
AG> def prune(file):
AG> if fileage(file) >
AGING:
AG> return
AG> ("T")
AG> else:
AG> return
AG> ("File should not be deleted")
AG>
AG> def purge(file):
AG> if prune(file) ==
"T":
AG>
AG> os.remove(file)
AG>
AG>
AG> if __name__ == '__main__':
AG> os.path.walk(sys.argv[1], lister,
None)
AG>
AG> --Adam Getchell
AG>
AG>
AG>
AG> --
Patricia J. Hawkins
Hawkins Internet Applications, LLC
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Shell tool
Sorry about the HTML mail -- here it is plain text.
If I understand the suggestions, to do this properly I should probably
be doing a Depth-First Search. Well, interestingly I need to do just
this for another tool which constructs a dependency tree based upon file
dependencies for a particular code.
I think the webchecker tool does something similar.
Before I try to write my own, I'd like to enquire about Python's
"batteries" -- is there a good built-in data structure to construct an
adjacency list of nodes that could be files or data sources?
Here's the other tool. It sounds like I might get away with adding to
the bottom of lister:
if os.path.isdir(path).isempty():
purge(path)
Except I'd have to loop through again ...?
Thanks for all the help!
"""Delete files older than AGING constant using os.path.walk"""
import sys, os, time
AGING = 172800 # Default 2 days
def lister(dummy, dirName, filesInDir):
print '[' + dirName + ']'
for fname in filesInDir:
path = os.path.join(dirName, fname)
if not os.path.isdir(path):
print path, time.ctime(os.stat(path).st_mtime),
fileage(path), prune(path)
purge(path)
def fileage(file):
curtime = time.time()
modtime = os.stat(file).st_mtime
age = curtime - modtime
return age
def prune(file):
if fileage(file) > AGING:
return ("T")
else:
return ("File should not be deleted")
def purge(file):
if prune(file) == "T":
os.remove(file)
if __name__ == '__main__':
os.path.walk(sys.argv[1], lister, None)
--Adam Getchell
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RE: Shell tool
Why not use Matthew's suggestion of os.removedirs() - sounds like its all
that you need. Its not as much fun, but I think that single call will do
what your entire script is intending to do.
- Rick
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Adam
Getchell
Sent: Sunday, May 12, 2002 10:17 PM
To: [EMAIL PROTECTED]
Subject: Shell tool
Sorry about the HTML mail -- here it is plain text.
If I understand the suggestions, to do this properly I should probably
be doing a Depth-First Search. Well, interestingly I need to do just
this for another tool which constructs a dependency tree based upon file
dependencies for a particular code.
I think the webchecker tool does something similar.
Before I try to write my own, I'd like to enquire about Python's
"batteries" -- is there a good built-in data structure to construct an
adjacency list of nodes that could be files or data sources?
Here's the other tool. It sounds like I might get away with adding to
the bottom of lister:
if os.path.isdir(path).isempty():
purge(path)
Except I'd have to loop through again ...?
Thanks for all the help!
"""Delete files older than AGING constant using os.path.walk"""
import sys, os, time
AGING = 172800 # Default 2 days
def lister(dummy, dirName, filesInDir):
print '[' + dirName + ']'
for fname in filesInDir:
path = os.path.join(dirName, fname)
if not os.path.isdir(path):
print path, time.ctime(os.stat(path).st_mtime),
fileage(path), prune(path)
purge(path)
def fileage(file):
curtime = time.time()
modtime = os.stat(file).st_mtime
age = curtime - modtime
return age
def prune(file):
if fileage(file) > AGING:
return ("T")
else:
return ("File should not be deleted")
def purge(file):
if prune(file) == "T":
os.remove(file)
if __name__ == '__main__':
os.path.walk(sys.argv[1], lister, None)
--Adam Getchell
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