The second concern of the issue was round() did not work for Series or Dataframe when using decimal.Decimal from python's default decimal module. It seems like this is because both NumPy and pandas give array-like structures of decimal.Decimal objects a dtype of object. When I tested NumPy it raised an error on np.array([decimal.Decimal("1.2234242333234")]).round().

If the it the behavior of round() working with Series and DataFrames withdecimal.Decimal objects is still wanted, I thought a clean solution would be to make a new custom dtype for decimal.Decimal. However, that seemed like a pretty big change so wanted to check if there was another way I should be thinking about this bugfix.