Simple sort for lists?

[Raymond Hettinger]

"R. Arens" <martian_bob at portalofevil.com>
> Hi, I'm using os.path.walk to walk through directories and join
> ordered files in the directories into one large file. Problem is,
> os.path.walk doesn't process the files in order, due to the way
> os.path.walk sends the filenames to the visit function. Does Python
> provide a method to sort the list of filenames provided by
> os.path.walk?

The code for os.path.walk is short, sweet, and easily copied so
you can roll your own version like this:

def walk(top, func, arg):
    try:
        names = os.listdir(top)
        names.sort()                 ## this is the one change
    except os.error:
        return
    func(arg, top, names)
    exceptions = ('.', '..')
    for name in names:
        if name not in exceptions:
            name = join(top, name)
            if isdir(name):
                walk(name, func, arg)

Raymond Hettinger