On 02/11/18 06:30, Victor Porton wrote:
> What is more pythonic?
> 
> 1. Create its subclass PredicateParserWithError and add the additional field 
> on_error to this class.
> 
> 2. Add on_error field to the base class, setting it to None by default, if 
> the class's user does not need this field.

Personally I would go with #1.  It just seems cleaner.  Not sure what
the Python gods would do.

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