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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def process_path(pth):
 """ Processes paths. Processes the provided path and breaks it into it Group part (`groupname`) and target part (`targetname`). ``bytes`` paths are converted to ``str``. Separated paths are given as an iterable of ``str`` and ``bytes``. Each part of a separated path is escaped using ``escape_path``. Otherwise, the path is assumed to be already escaped. Escaping is done so that targets with a part that starts with one or more periods, contain slashes, and/or contain nulls can be used without causing the wrong Group to be looked in or the wrong target to be looked at. It essentially allows one to make a Dataset named ``'..'`` or ``'a/a'`` instead of moving around in the Dataset hierarchy. All paths are POSIX style. .. versionadded:: 0.2 Parameters pth : str or bytes or iterable of str or bytes The POSIX style path as a ``str`` or ``bytes`` or the separated path in an iterable with the elements being ``str`` and ``bytes``. For separated paths, escaping will be done on each part. Returns ------- groupname : str The path to the Group containing the target `pth` was pointing to. targetname : str The name of the target pointed to by `pth` in the Group `groupname`. Raises ------ TypeError If `pth` is not of the right type. See Also -------- escape_path """

    # Do conversions and possibly escapes.
    if isinstance(pth, bytes):
        p = pth.decode('utf-8')
    elif (sys.hexversion >= 0x03000000 and isinstance(pth, str)) \
            or (sys.hexversion < 0x03000000 \
            and isinstance(pth, unicode)):
        p = pth
    elif not isinstance(pth, collections.Iterable):
        raise TypeError('p must be str, bytes, or an iterable '
                        + 'solely of one of those two.')
    else:
        # Check that all elements are unicode or bytes.
        if sys.hexversion >= 0x03000000:
            if not all([isinstance(s, (bytes, str)) for s in pth]):
                raise TypeError('Elements of p must be str or bytes.')
        else:
            if not all([isinstance(s, (str, unicode)) for s in pth]):
                raise TypeError('Elements of p must be str or '
                                + 'unicode.')

        # Escape (and possibly convert to unicode) each element and then
        # join them all together.
        parts = [None] * len(pth)
        for i, s in enumerate(pth):
            if isinstance(s, bytes):
                s = s.decode('utf-8')
            parts[i] = escape_path(s)
        parts = tuple(parts)
        p = posixpath.join(*parts)

    # Remove double slashes and a non-root trailing slash.
    path = posixpath.normpath(p)

    # Extract the group name and the target name (will be a dataset if
    # data can be mapped to it, but will end up being made into a group
    # otherwise. As HDF5 files use posix path, conventions, posixpath
    # will do everything.
    groupname = posixpath.dirname(path)
    targetname = posixpath.basename(path)

    # If groupname got turned into blank, then it is just root.
    if len(groupname) == 0:
        groupname = b'/'.decode('ascii')

    # If targetname got turned blank, then it is the current directory.
    if len(targetname) == 0:
        targetname = b'.'.decode('ascii')

    return groupname, targetname