def test_shallow_copy():
pd1 = ParamDict(a=3, b=4)
pd2 = pd1.copy_recursive()
pd1.a = 1
pd2.a = 2
pd2.b = 2
pd1.b = 1
assert pd1.a == 1
assert pd1.b == 1
assert pd2.a == 2
assert pd2.b == 2
def test_add_params_after_init_raises_with_attribute_notation():
pd = ParamDict()
with pytest.raises(RuntimeError):
pd.a = 1