lint

Author: earangol-stripe

api/py/ai/chronon/group_by.py

@@ -559,6 +559,7 @@ def _normalize_source(source):
     validate_group_by(group_by)
     return group_by
 
+
 def _copy_source(source: ttypes.Source) -> ttypes.Source:
     # Hold a reference to the join in a join source so that the
     # module name can be extracted from GC referrers later on
@@ -574,4 +575,4 @@ def _copy_source(source: ttypes.Source) -> ttypes.Source:
         source_copy.join = join
     elif isinstance(source_copy, ttypes.Source) and source_copy.joinSource:
         source_copy.joinSource.join = join
-    return source_copy
+    return source_copy