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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 get_library_path_and_name_for_os_path(self, path):
 """Generate valid library_path and library_name The method checks if the given os path is in the list of loaded library root paths and use respective library root key/mounting point to concatenate the respective library_path and separate respective library_name. :param str path: A library os path a library is situated in. :return: library path library name :rtype: str, str """

        library_path = None
        library_name = None
        library_root_key = self._get_library_root_key_for_os_path(path)
        if library_root_key is not None:
            library_root_path = self._library_root_paths[library_root_key]
            path_elements_without_library_root = path[len(library_root_path)+1:].split(os.sep)
            library_name = path_elements_without_library_root[-1]
            sub_library_path = ''
            if len(path_elements_without_library_root[:-1]):
                sub_library_path = os.sep + os.sep.join(path_elements_without_library_root[:-1])
            library_path = library_root_key + sub_library_path
        return library_path, library_name