human
Complete the below
def _walk_dirs(topdir, base_path=None, local_follow=False, trailing_slash_detector=None):

    ''''Walk a filesystem tree returning enough information to copy the files
    :arg topdir: The directory that the filesystem tree is rooted at
    :kwarg base_path: The initial directory structure to strip off of the
    files for the destination directory.  If this is None (the default),
    the base_path is set to ``top_dir``.
    :kwarg local_follow: Whether to follow symlinks on the source.  When set
    to False, no symlinks are dereferenced.  When set to True (the
    default), the code will dereference most symlinks.  However, symlinks
    can still be present if needed to break a circular link.
    :kwarg trailing_slash_detector: Function to determine if a path has
    a trailing directory separator. Only needed when dealing with paths on
    a remote machine (in which case, pass in a function that is aware of the
    directory separator conventions on the remote machine).
    :returns: dictionary of tuples.  All of the path elements in the structure are text strings.
    This separates all the files, directories, and symlinks along with
    important information about each::
    { \'files\': [(\'/absolute/path/to/copy/from\', \'relative/path/to/copy/to\'), ...],
    \'directories\': [(\'/absolute/path/to/copy/from\', \'relative/path/to/copy/to\'), ...],
    \'symlinks\': [(\'/symlink/target/path\', \'relative/path/to/copy/to\'), ...],
    The ``symlinks`` field is only populated if ``local_follow`` is set to False
    *or* a circular symlink cannot be dereferenced.'
    '''

Give me a Python program to determine if a path has?
assistant
#Here is Python program to determine if a path has
.
    r_files = {'files': [], 'directories': [], 'symlinks': []}
    def _recurse(topdir, rel_offset, parent_dirs, rel_base=u''):
        "\n                                This    is    a    closure    (function    utilizing    variables    from    it's    parent\n                                function's    scope)    so    that    we    only    need    one    copy    of    all    the    containers.\n                                Note    that    this    function    uses    side    effects    (See    the    Variables    used    from\n                                outer    scope).\n\n                                :arg    topdir:    The    directory    we    are    walking    for    files\n                                :arg    rel_offset:    Integer    defining    how    many    characters    to    strip    off    of\n                                                the    beginning    of    a    path\n                                :arg    parent_dirs:    Directories    that    we're    copying    that    this    directory    is    in.\n                                :kwarg    rel_base:    String    to    prepend    to    the    path    after    ``rel_offset``    is\n                                                applied    to    form    the    relative    path.\n\n                                Variables    used    from    the    outer    scope\n                                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n\n                                :r_files:    Dictionary    of    files    in    the    hierarchy.        See    the    return    value\n                                                for    :func:`walk`    for    the    structure    of    this    dictionary.\n                                :local_follow:    Read-only    inside    of    :func:`_recurse`.    Whether    to    follow    symlinks\n                                "
        for (base_path, sub_folders, files) in os.walk(topdir):
            for filename in files:
                filepath = os.path.join(base_path, filename)
   ...