def engine(self):
if self._engine is None:
project_id = os.environ['GOOGLE_CLOUD_PROJECT']
engine = cg_engine.Engine(project_id=project_id,
proto_version=cg_engine.ProtoVersion.V2)
self._engine = engine
return self._engine
def get_engine_sampler(processor_id: str, gate_set_name: str,
project_id: Optional[str] = None) \
-> 'cirq.google.QuantumEngineSampler':
"""Get an EngineSampler assuming some sensible defaults.
This uses the environment variable GOOGLE_GLOUD_PROJECT for the Engine
project_id, unless set explicitly.
Args:
processor_id: Engine processor ID (from Cloud console or
``Engine.list_processors``).
gate_set_name: One of ['sqrt_iswap', 'sycamore'].
See `cirq.google.NAMED_GATESETS`.
project_id: Optional explicit Google Cloud project id. Otherwise,
this defaults to the environment variable GOOGLE_CLOUD_PROJECT.
By using an environment variable, you can avoid hard-coding
personal project IDs in shared code.
"""
try:
gate_set = gate_sets.NAMED_GATESETS[gate_set_name]
except KeyError:
raise ValueError(f"Please use one of the following gateset names: "
f"{sorted(gate_sets.NAMED_GATESETS.keys())}")
if project_id is None:
project_id = os.environ['GOOGLE_CLOUD_PROJECT']
return engine.Engine(project_id=project_id,
proto_version=engine.ProtoVersion.V2) \
.sampler(processor_id=processor_id, gate_set=gate_set)
def __init__(self, processor_id: str, gateset: str):
project_id = os.environ['GOOGLE_CLOUD_PROJECT']
engine = cg_engine.Engine(project_id=project_id,
proto_version=cg_engine.ProtoVersion.V2)
self.engine = engine
self.processor_id = processor_id
if gateset == 'sycamore':
self.gate_set = gate_sets.SYC_GATESET
elif gateset == 'sqrt-iswap':
self.gate_set = gate_sets.SQRT_ISWAP_GATESET
else:
raise ValueError("Unknown gateset {}".format(gateset))