def _wrapper(obj, *args, **kwargs):
qe_token = kwargs.pop('qe_token')
qe_url = kwargs.pop('qe_url')
if not IBMQ.active_account():
IBMQ.enable_account(qe_token, qe_url)
backend_name = os.getenv('QE_STAGING_DEVICE', None) if \
os.getenv('USE_STAGING_CREDENTIALS', '') else os.getenv('QE_DEVICE', None)
_backend = None
provider = _get_custom_provider(IBMQ) or list(
IBMQ._providers.values())[0]
if backend_name:
# Put desired provider as the first in the list.
providers = [provider] + IBMQ.providers()
for provider in providers:
backends = provider.backends(name=backend_name)
if backends:
_backend = backends[0]
break
else:
_backend = least_busy(
provider.backends(
simulator=False,
filters=lambda b: b.configuration().n_qubits >= 5))
if not _backend:
raise Exception('Unable to find a suitable backend.')
kwargs.update({'backend': _backend})
return func(obj, *args, **kwargs)
def _try_login_saved_account(cls) -> bool:
if not QiskitIBMQ.active_account():
try:
QiskitIBMQ.load_account()
except IBMQAccountCredentialsNotFound:
print(f"No saved account found for IBMQ. Only simulator devices will be available. {_IBMQHints.LOGIN}")
return False # Failed login
return True # Successful login
def _enable_account(qe_token: str, qe_url: str) -> None:
"""Enable the account if one is not already active.
:param qe_token: API token.
:param qe_url: API URL.
"""
if not IBMQ.active_account():
IBMQ.enable_account(qe_token, qe_url)
def _wrapper(*args, **kwargs):
qe_token = kwargs.pop('qe_token')
qe_url = kwargs.pop('qe_url')
if not IBMQ.active_account():
IBMQ.enable_account(qe_token, qe_url)
provider = _get_custom_provider(IBMQ) or list(
IBMQ._providers.values())[0]
kwargs.update({'provider': provider})
return func(*args, **kwargs)
def _enable_account(qe_token: str, qe_url: str) -> None:
"""Enable the account if one is not already active.
Args:
qe_token: API token.
qe_url: API URL.
"""
active_account = IBMQ.active_account()
if active_account:
if active_account.get('token', '') == qe_token:
return
IBMQ.disable_account()
IBMQ.enable_account(qe_token, qe_url)
def account(cls) -> str:
active_account = QiskitIBMQ.active_account()
if not active_account:
print("No active account")
return active_account if active_account else ""
