import projectq.setups.ibm16

from projectq.backends import IBMBackend

from projectq.ops import All, Entangle, Measure

from projectq import MainEngine

def run_test(eng):

"""

Runs a test circuit on the provided compiler engine.

Args:

eng (MainEngine): Main compiler engine to use.

Returns:

measurement (list<int>): List of measurement outcomes.

"""

# allocate the quantum register to entangle

qureg = eng.allocate_qureg(8)

Entangle | qureg

# measure; should be all-0 or all-1

All(Measure) | qureg

# run the circuit

eng.flush()

# access the probabilities via the back-end:

results = eng.backend.get_probabilities(qureg)

for state, probability in sorted(list(results.items())):

print("Measured {} with p = {}.".format(state, probability))

# return one (random) measurement outcome.

return [int(q) for q in qureg]

if __name__ == "__main__":

# create main compiler engine for the 16-qubit IBM back-end

eng = MainEngine(IBMBackend(use_hardware=True, num_runs=1024,

verbose=False, device='ibmqx5'),

engine_list=projectq.setups.ibm16.get_engine_list())

# run the circuit and print the result

print(run_test(eng))