KeyError: 'WhichOneof' while converting time series data to dataframe

[ireneusz-ptak]

Using the latest (2.0.1) version of the API and I just can't make this simple example work:

query=google.cloud.monitoring_v3.query.Query(monitoring_v3.services.metric_service.client.MetricServiceClient(),
            project_name,
            metric_type='storage.googleapis.com/authz/acl_operations_count', 
            end_time=None, 
            days=7
            )

query.as_dataframe()

I'm getting the following error:

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
~/miniconda3/lib/python3.8/site-packages/proto/message.py in __getattr__(self, key)
    559         try:
--> 560             pb_type = self._meta.fields[key].pb_type
    561             pb_value = getattr(self._pb, key)

KeyError: 'WhichOneof'

During handling of the above exception, another exception occurred:

AttributeError                            Traceback (most recent call last)
<ipython-input-19-a95d81571ff4> in <module>
      8 print(type(query))
      9 
---> 10 query.as_dataframe()

~/miniconda3/lib/python3.8/site-packages/google/cloud/monitoring_v3/query.py in as_dataframe(self, label, labels)
    533         :returns: A dataframe where each column represents one time series.
    534         """
--> 535         return _dataframe._build_dataframe(self, label, labels)
    536 
    537     def __deepcopy__(self, memo):

~/miniconda3/lib/python3.8/site-packages/google/cloud/monitoring_v3/_dataframe.py in _build_dataframe(time_series_iterable, label, labels)
     94     for time_series in time_series_iterable:
     95         pandas_series = pandas.Series(
---> 96             data=[_extract_value(point.value) for point in time_series.points],
     97             index=[
     98                 point.interval.end_time.ToNanoseconds() for point in time_series.points

~/miniconda3/lib/python3.8/site-packages/google/cloud/monitoring_v3/_dataframe.py in <listcomp>(.0)
     94     for time_series in time_series_iterable:
     95         pandas_series = pandas.Series(
---> 96             data=[_extract_value(point.value) for point in time_series.points],
     97             index=[
     98                 point.interval.end_time.ToNanoseconds() for point in time_series.points

~/miniconda3/lib/python3.8/site-packages/google/cloud/monitoring_v3/_dataframe.py in _extract_value(typed_value)
     47 def _extract_value(typed_value):
     48     """Extract the value from a TypedValue."""
---> 49     value_type = typed_value.WhichOneof("value")
     50     return typed_value.__getattribute__(value_type)
     51 

~/miniconda3/lib/python3.8/site-packages/proto/message.py in __getattr__(self, key)
    563             return marshal.to_python(pb_type, pb_value, absent=key not in self)
    564         except KeyError as ex:
--> 565             raise AttributeError(str(ex))
    566 
    567     def __ne__(self, other):

AttributeError: 'WhichOneof'

Is it me or it should work?

[busunkim96]

Hi @ireneusz-ptak,

It looks like at some point we accidentally stopped running the dataframe tests (if pandas isn't installed they silently skip. Given the amount of changes to the library between 1.x and 2.x I suspect that code is very broken on the latest release.

Thank you for the report, and apologies for the inconvenience!