get_historical_data - key error 'date'

[dsl-dsl]

Summary (include Python version)

Python 3.6.4

Date/time of issue

25th September 2018

Expected behavior

to get empty dictionary or empty dataframe

Actual behavior

When calling get_historical_data for symbol 'ZNWAA' I get an keyerror 'date'. This happens on setting index od 'Date'. As long as IEX do not provide any data for this symbol the index can not be set on empty dataframe.

[addisonlynch]

This should throw a IEXQueryError IEXSymbolError.