def delete_network_precommit(self, context):
        self._call_on_drivers("delete_network_precommit", context)
fh should be a seekable file-like byte stream object
dataset/ETHPy150Open openstack/neutron/neutron/plugins/ml2/managers.py/MechanismManager.delete_network_precommit--crossover with--dataset/ETHPy150Open jseutter/ofxparse/ofxparse/ofxparse.py/OfxFile.__init__