def primary_key_from_instance(self, instance):
        state = attributes.instance_state(instance)
        return self._primary_key_from_state(state)
:type varname: str
dataset/ETHPy150Open goFrendiAsgard/kokoropy/kokoropy/packages/sqlalchemy/orm/mapper.py/Mapper.primary_key_from_instance--crossover with--dataset/ETHPy150Open Blazemeter/taurus/bzt/jmx.py/JMX._get_extractor