def _expand_tuple(path_cfg, alias_dict, overriding_kargs):
<EOL>new_path_cfg = path_cfg[<NUM_LIT:0>]<EOL>new_overriding_kargs = path_cfg[<NUM_LIT:1>].copy()<EOL>new_overriding_kargs.update(overriding_kargs)<EOL>return expand_path_cfg(<EOL>new_path_cfg,<EOL>overriding_kargs=new_overriding_kargs,<EOL>alias_dict=alias_dict<EOL>)<EOL>
expand a path config given as a tuple