def __init__(self, file_name=None):
        UserDict.__init__(self)
        self.mutable = True
        if file_name is not None:
            self.load(file_name)
It raises PayloadError if parsing of the request body fails.
dataset/ETHPy150Open Axelrod-Python/Axelrod/axelrod/deterministic_cache.py/DeterministicCache.__init__--crossover with--dataset/ETHPy150Open hypothesis/h/h/api/test/views_test.py/TestUpdate.test_it_raises_if_json_parsing_fails