Ministeyr wrote:
> When walking top to bottom, it allows you to choose the directories
> you want to visit dynamically by changing the second parameter of the
> tuple (a list of directories). However, since it is a tuple, you
> cannot use "filter" on it, since it would mean reassigning it:
>
> for dir_tuple in os.walk('/home'):
> dir_tuple[1]=filter(lambda x: not x.startswith('.'),
> dir_tuple[1])
> #do not show hidden files
> print dir_tuple #just print the directory and its
> contents in the
> simplest possible way
>
> If os.walk did return a list of three items instead of a tuple, that
> would become possible.
But you don't need to assign to it, you simply need to mutate it:
for dir, subdirs, files in os.walk('/home'):
subdirs[:] = [d for d in subdirs if not d.startswith('.')]
print dir, subdirs, files
(and if you are desparate to use filter+lambda that works as well.)
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