return empty table rather than None
@@ -221,7 +221,7 @@ class HeasarcClass(BaseQuery):
"\nCheck error message: \n{!s}".format(response.text))
elif "NO MATCHING ROWS" in response.text:
warnings.warn(NoResultsWarning("No matching rows were found in the query."))
- return
+ return Table()
try:
data = BytesIO(response.content)
