pythonic tree-walking idioms

[Shak]

Thanks... appreciate all the responses... however I didn't realize that
"yield" was a python keyword... seems ruby-like to me...

raskol at hushmail.com


"Neil Schemenauer" <nas at python.ca> wrote in message
news:mailman.990151286.25454.python-list at python.org...
> Fredrik Lundh wrote:
> > (chances are that Python 2.2 will provide a better iterator inter-
> > face, which makes this a bit more efficient.  see PEP 234 for more
> > info [2]).
>
> Here's something that works with my generators:
>
>     import os
>
>     def walk(directory):
>         stack = [directory]
>         while stack:
>             directory = stack.pop()
>             for file in os.listdir(directory):
>                 fullname = os.path.join(directory, file)
>                 if os.path.isdir(fullname) and not
os.path.islink(fullname):
>                     stack.append(fullname)
>                 yield fullname
>
> Its also easy to build on.  Here's a generator that works a bit
> like the find command.
>
>     import fnmatch
>
>     def find(directory, pat):
>         for file in walk(directory):
>             if fnmatch.fnmatch(file, pat):
>                 yield file
>
>     # find all the Python sources in the current directory
>     for file in find(".", "*.py"):
>         print file
>
>
> If your curious about generators and iterators most of the
> discussion seems to be occuring on the SF mailing list¹.
>
>   Neil
>
>
> ¹ python-iterators at lists.sourceforge.net
>




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