def get_device_path(blockdevice_id):
Adds or substracts terms.
dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/blockdevice.py/IBlockDeviceAPI.get_device_path--crossover with--dataset/ETHPy150Open igordejanovic/Arpeggio/examples/calc/calc.py/CalcVisitor.visit_expression