How to use the scandir.GenericDirEntry function in scandir

# objects) instead. Keep a mapping of entries keyed by name.
        dir_names = []
        entries_by_name = {}
        for entry in dirs:
            dir_names.append(entry.name)
            entries_by_name[entry.name] = entry

        yield top, dir_names, [e.name for e in nondirs]

        dirs = []
        for dir_name in dir_names:
            entry = entries_by_name.get(dir_name)
            if entry is None:
                # Only happens when caller creates a new directory and adds it
                # to dir_names
                entry = GenericDirEntry(top, dir_name)
            dirs.append(entry)

    # Recurse into sub-directories, following symbolic links if "followlinks"
    for entry in dirs:
        if followlinks or not entry.is_symlink():
            new_path = join(top, entry.name)
            for x in walk(new_path, topdown, onerror, followlinks):
                yield x

    # Yield before recursion if going bottom up
    if not topdown:
        yield top, [e.name for e in dirs], [e.name for e in nondirs]

def _scandir_generic(path=unicode('.')):
    """Like os.listdir(), but yield DirEntry objects instead of returning
    a list of names.
    """
    for name in listdir(path):
        yield GenericDirEntry(path, name)

def scandir(path='.'):
        """Like os.listdir(), but yield DirEntry objects instead of returning
        a list of names.
        """
        for name in os.listdir(path):
            yield GenericDirEntry(path, name)