def __init__(self, q_jobs, callback, max_workers=1):
"""
Args:
q_jobs (list(QuantumJob)): List of QuantumJob objects.
callback (fn(results)): The function that will be called when all
jobs finish. The signature of the function must be:
fn(results)
results: A list of Result objects.
max_workers (int): The maximum number of workers to use.
Raises:
QISKitError: if any of the job backends could not be found.
"""
self.q_jobs = q_jobs
self.max_workers = max_workers
# check whether any jobs are remote
self.online = any(qj.backend not in local_backends() for qj in q_jobs)
self.futures = {}
self.lock = Lock()
# Set a default dummy callback just in case the user doesn't want
# to pass any callback.
self.callback = (lambda rs: ()) if callback is None else callback
self.num_jobs = len(self.q_jobs)
self.jobs_results = []
if self.online:
# verify backends across all jobs
for q_job in q_jobs:
if q_job.backend not in remote_backends() + local_backends():
raise QISKitError("Backend %s not found!" % q_job.backend)
if self.online:
# I/O intensive -> use ThreadedPoolExecutor
self.executor_class = futures.ThreadPoolExecutor
else:
# CPU intensive -> use ProcessPoolExecutor
self.executor_class = futures.ProcessPoolExecutor
def test_remote_backends(self):
self.log.info('The discovered remote devices are: {}'.format(
remote_backends()))
def test_remote_backends(self):
self.log.info('The discovered remote devices are: {}'.format(
remote_backends()))
def test_remote_backends(self):
self.log.info('The discovered remote devices are: %s',
remote_backends())
bv.x(tmp[0])
bv.h(q)
bv.h(tmp)
bv += oracle
bv.h(q)
bv.h(tmp)
bv.measure(q, res)
print(bv.qasm())
from qiskit.tools.visualization import circuit_drawer
circuit_drawer(bv)
from qiskit import QuantumProgram
qp = QuantumProgram()
qp.add_circuit(quantum_circuit=bv, name='bv')
from qiskit import backends
print(backends.local_backends())
print(backends.remote_backends())
import Qconfig
qp.set_api(Qconfig.APItoken, Qconfig.config['url'])
result = qp.execute('bv', backend='ibmqx4', timeout=3600)
counts = result.get_counts('bv')
print(counts)
from qiskit.tools.visualization import plot_histogram
plot_histogram(counts)