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

 

[johnzenger]

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]

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>

 

[Edward Elliott]

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]

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

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]

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:
[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