def where_not_exists(self, query, boolean='and'):
        return self.where_exists(query, boolean, True)
obtain version and path info from a virtualenv.
dataset/ETHPy150Open sdispater/orator/orator/query/builder.py/QueryBuilder.where_not_exists--crossover with--dataset/ETHPy150Open edwardgeorge/virtualenv-clone/clonevirtualenv.py/_virtualenv_sys