[Tutor] Problem with os.walk
tim.one at comcast.net
Tue May 11 10:56:00 EDT 2004
> The docs say that you can del the dirnames list.
"the caller can modify the dirnames list in-place (e.g., via del or slice
"in-place" means things of the form
dirnames[:] = ['new directory']
> But when I tried doing it, it didn't work.
You have to show the exact code you used, else nobody can guess.
> I tried del
That's not enough to guess. Maybe you did
? That indeed would not work.
> and dirnames = dirnames[0:0]
The binds dirnames to a brand new object, so is not an in-place modification
either. If you want to empty dirnames entirely, two ways to do it in-place
dirnames[:] = 
> Both didn't work. The only thing that wOrked was.
> for d in dirnames[:]:
The two above will also work.
> And if I didn't make a copy it didn't work correctly. (it seems
> that for i in list works with indexing behindethe seigns).
Yes. This is documented in the Language Reference manual (not the Library
Reference manual), in the section on "for" loops.
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