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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_type_hints(func, args = None, res = None, infer_defaults = None):
 """Helper for get_type_hints. """

    if args is None or res is None:
        args2, res2 = _get_types(func, util.is_classmethod(func),
                util.is_method(func), unspecified_type = type(NotImplemented),
                infer_defaults = infer_defaults)
        if args is None:
            args = args2
        if res is None:
            res = res2
    slf = 1 if util.is_method(func) else 0
    argNames = util.getargnames(util.getargspecs(util._actualfunc(func)))
    result = {}
    if not args is Any:
        prms = get_Tuple_params(args)
        for i in range(slf, len(argNames)):
            if not prms[i-slf] is type(NotImplemented):
                result[argNames[i]] = prms[i-slf]
    result['return'] = res
    return result