def test_pop(self):
example = DataClass(a=1, b=2)
assert example.pop("a") == 1
assert ["b"] == list(example.keys())
with pytest.raises(KeyError):
_ = example.pop("a")
assert example.pop("a", 100) == 100
def test_clear(self):
data = DataClass(a=1, b=2)
data.clear()
assert list(data.keys()) == []