@_generative
    def returning(self, *cols):
        self._returning = cols
Subtract two images
dataset/ETHPy150Open zzzeek/sqlalchemy/lib/sqlalchemy/sql/dml.py/UpdateBase.returning--crossover with--dataset/ETHPy150Open kleientertainment/ds_mod_tools/pkg/win32/Python27/Lib/site-packages/PIL/ImageChops.py/subtract