ligo/scald/io/kafka.py: set key to empty list if not given, not None (!48) · Merge requests · gstlal-visualisation / ligo-scald

This fixes a bug that causes the scald aggregate job to fail with the error:

File "/usr/lib/python3.6/site-packages/ligo/scald/io/kafka.py", line 100, in query
    tuple(key),
TypeError: 'NoneType' object is not iterable

in the case that scald receives messages without any keys.

ligo/scald/io/kafka.py: set key to empty list if not given, not None