Gettings subdirectories

[Florian Lindner]

Hello,
how can I get all subdirectories of a given directories? os.listdir() gives
me all entries and I've found no way to tell if an object is a file or a
directory.

Thanks,

Florian

[Sybren Stuvel]

Florian Lindner enlightened us with:

> how can I get all subdirectories of a given directories?
> os.listdir() gives me all entries and I've found no way to tell if
> an object is a file or a directory.

Why, doesn't your os.path.isdir() function work?

Sybren
--
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself?
Frank Zappa

[johnz...@gmail.com]

It's a bit overkill, but consider using os.walk.

root, dirnames, filenames = os.walk(r"C:\").next() # (in real code,
you'd want to catch exceptions here)
print dirnames

[BartlebyScrivener]

>> root, dirnames, filenames = os.walk(r"C:\").next()

Wow. How does that work? Just point me to where I can read about it. I
don't see it under os.walk.

That's cool.

Thanks,

Rick

[Ben Finney]

"BartlebyScrivener" <rpdo...@gmail.com> writes:

> >> root, dirnames, filenames = os.walk(r"C:\").next()
>
> Wow. How does that work? Just point me to where I can read about it. I
> don't see it under os.walk.

We must be reading different Python websites.

walk(top[, topdown=True [, onerror=None]])

walk() generates the file names in a directory tree, by walking
the tree either top down or bottom up. For each directory in the
tree rooted at directory top (including top itself), it yields a
3-tuple (dirpath, dirnames, filenames).

<URL:http://docs.python.org/lib/os-file-dir.html#l2h-1638>

--
\ "Sittin' on the fence, that's a dangerous course / You can even |
`\ catch a bullet from the peace-keeping force" -- Dire Straits, |
_o__) _Once Upon A Time In The West_ |
Ben Finney

[Edward Elliott]

Ben Finney wrote:
> We must be reading different Python websites.
>
> walk(top[, topdown=True [, onerror=None]])
>
> walk() generates the file names in a directory tree, by walking
> the tree either top down or bottom up. For each directory in the
> tree rooted at directory top (including top itself), it yields a
> 3-tuple (dirpath, dirnames, filenames).

Maybe he meant os.path.walk, although that's still not quite what he had.

[BartlebyScrivener]

Sorry that I was unclear.

I sorta know how os.walk works. It's the .next() trick that I had never
seen before. For instance, if you run that statement without the
.next() on it, it says "Too many items to unpack" but with the .next()
it stops it somehow, right where I want it to stop.

It's an iterator method, right? I found it in Beazely, now I'll try to
understand it. Sorry to trouble you.

rick

[Adonis]

Here is a quick hack:

import os
import os.path

givenDir = "/"
listing = os.listdir(givenDir)
for item in listing:
joinPath = os.path.join(givenDir, item)
normPath = os.path.normpath(joinPath)
if os.path.isdir(normPath):
print normPath

[BartlebyScrivener]

Thank you all for the great info and education.

rick

[Philippe Martin]

Hi,

The second edition of "Programming Python - O'REILLY - Mark Lutz" shows how
to do that using "os.path.walk"

Philippe

[alex23]

Florian Lindner wrote:
> how can I get all subdirectories of a given directories?

If you're not adverse to a solution outside of the standard lib, I
highly recommend the 'path' module:

>>> from path import path
>>> c = path("C:\\")
>>> c.dirs()
[path(u'C:\\cmdcons'), path(u'C:\\Config.Msi'), path(u'C:\\Logon'),
path(u'C:\\Program Files'), path(u'C:\\Python24'),
path(u'C:\\RECYCLER'), path(u'C:\\System Volume Information'),
path(u'C:\\WINDOWS'), path(u'C:\\WINSRC')]

http://www.jorendorff.com/articles/python/path/

Hope this helps.

- alex23