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lang-py
filter()function? You don't even need to import it.Fooobjects and check withisinstance(object, Foo)or, if you prefer you can do something like create an Enum of foo, bar, baz and set a field on the emitted objects with the appropriate one.ifstatement (or even the need to definefilterOnlyFoo); or do you refer to the work happening in the complicated logic ofif ... something ...: bar = ...that you would like to optimise away when you know beforehand that you will only handlefoos?