target = functools.partial(>)
predicate = .if_exception_type_predicate at 0x7f9e2384daf0>
sleep_generator = 
deadline = 120, on_error = None
def retry_target(target, predicate, sleep_generator, deadline, on_error=None):
    """Call a function and retry if it fails.

    This is the lowest-level retry helper. Generally, you'll use the
    higher-level retry helper :class:`Retry`.

    Args:
        target(Callable): The function to call and retry. This must be a
            nullary function - apply arguments with `functools.partial`.
        predicate (Callable[Exception]): A callable used to determine if an
            exception raised by the target should be considered retryable.
            It should return True to retry or False otherwise.
        sleep_generator (Iterable[float]): An infinite iterator that determines
            how long to sleep between retries.
        deadline (float): How long to keep retrying the target. The last sleep
            period is shortened as necessary, so that the last retry runs at
            ``deadline`` (and not considerably beyond it).
        on_error (Callable[Exception]): A function to call while processing a
            retryable exception.  Any error raised by this function will *not*
            be caught.

    Returns:
        Any: the return value of the target function.

    Raises:
        google.api_core.RetryError: If the deadline is exceeded while retrying.
        ValueError: If the sleep generator stops yielding values.
        Exception: If the target raises a method that isn't retryable.
    """
    if deadline is not None:
        deadline_datetime = datetime_helpers.utcnow() + datetime.timedelta(
            seconds=deadline
        )
    else:
        deadline_datetime = None

    last_exc = None

    for sleep in sleep_generator:
        try:


          return target()


.nox/py-3-8/lib/python3.8/site-packages/google/api_core/retry.py:188:

self = <google.api_core.operation.Operation object at 0x7f9e235dfa00>

retry = <google.api_core.retry.Retry object at 0x7f9e2396e640>
def _done_or_raise(self, retry=DEFAULT_RETRY):
    """Check if the future is done and raise if it's not."""
    kwargs = {} if retry is DEFAULT_RETRY else {"retry": retry}

    if not self.done(**kwargs):


      raise _OperationNotComplete()


E           google.api_core.future.polling._OperationNotComplete
.nox/py-3-8/lib/python3.8/site-packages/google/api_core/future/polling.py:86: _OperationNotComplete
The above exception was the direct cause of the following exception:
self = <google.api_core.operation.Operation object at 0x7f9e235dfa00>

timeout = 120, retry = <google.api_core.retry.Retry object at 0x7f9e2396e640>
def _blocking_poll(self, timeout=None, retry=DEFAULT_RETRY):
    """Poll and wait for the Future to be resolved.

    Args:
        timeout (int):
            How long (in seconds) to wait for the operation to complete.
            If None, wait indefinitely.
    """
    if self._result_set:
        return

    retry_ = self._retry.with_deadline(timeout)

    try:
        kwargs = {} if retry is DEFAULT_RETRY else {"retry": retry}


      retry_(self._done_or_raise)(**kwargs)


.nox/py-3-8/lib/python3.8/site-packages/google/api_core/future/polling.py:107:

args = (), kwargs = {}

target = functools.partial(<bound method PollingFuture._done_or_raise of <google.api_core.operation.Operation object at 0x7f9e235dfa00>>)

sleep_generator = <generator object exponential_sleep_generator at 0x7f9e23390270>
@general_helpers.wraps(func)
def retry_wrapped_func(*args, **kwargs):
    """A wrapper that calls target function with retry."""
    target = functools.partial(func, *args, **kwargs)
    sleep_generator = exponential_sleep_generator(
        self._initial, self._maximum, multiplier=self._multiplier
    )


  return retry_target(


        target,
        self._predicate,
        sleep_generator,
        self._deadline,
        on_error=on_error,
    )

.nox/py-3-8/lib/python3.8/site-packages/google/api_core/retry.py:285:

target = functools.partial(<bound method PollingFuture._done_or_raise of <google.api_core.operation.Operation object at 0x7f9e235dfa00>>)

predicate = <function if_exception_type..if_exception_type_predicate at 0x7f9e2384daf0>

sleep_generator = <generator object exponential_sleep_generator at 0x7f9e23390270>

deadline = 120, on_error = None
def retry_target(target, predicate, sleep_generator, deadline, on_error=None):
    """Call a function and retry if it fails.

    This is the lowest-level retry helper. Generally, you'll use the
    higher-level retry helper :class:`Retry`.

    Args:
        target(Callable): The function to call and retry. This must be a
            nullary function - apply arguments with `functools.partial`.
        predicate (Callable[Exception]): A callable used to determine if an
            exception raised by the target should be considered retryable.
            It should return True to retry or False otherwise.
        sleep_generator (Iterable[float]): An infinite iterator that determines
            how long to sleep between retries.
        deadline (float): How long to keep retrying the target. The last sleep
            period is shortened as necessary, so that the last retry runs at
            ``deadline`` (and not considerably beyond it).
        on_error (Callable[Exception]): A function to call while processing a
            retryable exception.  Any error raised by this function will *not*
            be caught.

    Returns:
        Any: the return value of the target function.

    Raises:
        google.api_core.RetryError: If the deadline is exceeded while retrying.
        ValueError: If the sleep generator stops yielding values.
        Exception: If the target raises a method that isn't retryable.
    """
    if deadline is not None:
        deadline_datetime = datetime_helpers.utcnow() + datetime.timedelta(
            seconds=deadline
        )
    else:
        deadline_datetime = None

    last_exc = None

    for sleep in sleep_generator:
        try:
            return target()

        # pylint: disable=broad-except
        # This function explicitly must deal with broad exceptions.
        except Exception as exc:
            if not predicate(exc):
                raise
            last_exc = exc
            if on_error is not None:
                on_error(exc)

        now = datetime_helpers.utcnow()

        if deadline_datetime is not None:
            if deadline_datetime <= now:


              six.raise_from(


                    exceptions.RetryError(
                        "Deadline of {:.1f}s exceeded while calling {}".format(
                            deadline, target
                        ),
                        last_exc,
                    ),
                    last_exc,
                )

.nox/py-3-8/lib/python3.8/site-packages/google/api_core/retry.py:203:

value = None, from_value = _OperationNotComplete()

???

E   google.api_core.exceptions.RetryError: Deadline of 120.0s exceeded while calling functools.partial(<bound method PollingFuture._done_or_raise of <google.api_core.operation.Operation object at 0x7f9e235dfa00>>), last exception:

:3: RetryError
During handling of the above exception, another exception occurred:
capsys = <_pytest.capture.CaptureFixture object at 0x7f9e2359f790>
def test_add_index(capsys):


  snippets.add_index(INSTANCE_ID, DATABASE_ID)


snippets_test.py:140:

snippets.py:310: in add_index

operation.result(120)

.nox/py-3-8/lib/python3.8/site-packages/google/api_core/future/polling.py:129: in result

self._blocking_poll(timeout=timeout, **kwargs)

self = <google.api_core.operation.Operation object at 0x7f9e235dfa00>

timeout = 120, retry = <google.api_core.retry.Retry object at 0x7f9e2396e640>
def _blocking_poll(self, timeout=None, retry=DEFAULT_RETRY):
    """Poll and wait for the Future to be resolved.

    Args:
        timeout (int):
            How long (in seconds) to wait for the operation to complete.
            If None, wait indefinitely.
    """
    if self._result_set:
        return

    retry_ = self._retry.with_deadline(timeout)

    try:
        kwargs = {} if retry is DEFAULT_RETRY else {"retry": retry}
        retry_(self._done_or_raise)(**kwargs)
    except exceptions.RetryError:


      raise concurrent.futures.TimeoutError(


            "Operation did not complete within the designated " "timeout."
        )

E           concurrent.futures._base.TimeoutError: Operation did not complete within the designated timeout.
.nox/py-3-8/lib/python3.8/site-packages/google/api_core/future/polling.py:109: TimeoutError