If the returned data stream doesn't have any values (this also probably happens when some of the values are missing, but not all), then the returned DataFrame (in the python bindings) is filled with 0s. We want to properly communicate when there is missing data
If the returned data stream doesn't have any values (this also probably happens when some of the values are missing, but not all), then the returned DataFrame (in the python bindings) is filled with 0s. We want to properly communicate when there is missing data