def _make_valid_param_dicts(arg_dict):
    """Unpack dictionary of lists of numbers into dictionary of numbers.

    Ex: turn {'a': [0, 1], 'b':[2, 3]} into [{'a': 0, 'b': 2}, {'a': 1, 'b': 3}]
    """
    return [dict(zip(arg_dict, val)) for val in zip(*arg_dict.values())]