[Python-3000] Removal of os.path.walk

["Martin v. Löwis"]

Guido van Rossum wrote:
> There is one use case I can see for an iterator-version of
> os.listdir() (to be named os.opendir()): when globbing a huge
> directory looking for a certain pattern. Using os.listdir() you end up
> needed enough memory to hold all of the names at once. Using
> os.opendir() you would need only enough memory to hold all of the
> names THAT MATCH.

You would still have to read the entire directory, right?
In that kind of class, there is a number of applications;
e.g. du(1) also wouldn't have to create a list of all files
in the directory, but add the sizes of the files incrementally.

So the question really is whether it is a problem to keep
all file names in memory simultaneously. As Aahz says, the
total memory consumption for a large directory is still
comparatively low, for today's machines.

Regards,
Martin