Extend surveycodex objects

Frozen dataclasses

The goal of surveycodex is to provide a sourced reference for survey parameters. Therefore the Survey and Filter objects have been implemented as frozen dataclasses. This means that trying to modify the attributes of an instance of a Survey or a Filter will raise a FrozenInstanceError.

Nevertheless, one might possibly want to modify or extend the instances of the dataclasses found in surveycodex for specific purposes. This can be achieved through inheritance.

Inheritance

A frozen dataclass creates a class for which the call to the __setattr__ method raises a FrozenInstanceError. A short way to bypass that feature is to inherit from the main class and modify the __setattr__ method to recover its classic behavior.

class ExtensibleSurvey(Survey):
     def __setattr__(self, x, val):
         self.__dict__[x] = val

The ExtensibleSurvey will behave just as the surveycodex Survey and will be extendable or modifiable. This is also true for the Filter class.

To be used at you own risk