add comment

MDAnalysis · Dec 4, 2024 · cdc7870 · cdc7870
1 parent 3507999
commit cdc7870
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/testsuite/MDAnalysisTests/util.py b/testsuite/MDAnalysisTests/util.py
@@ -233,6 +233,9 @@ def _warn(self, message, category=None, *args, **kwargs):
         if isinstance(message, Warning):
             self._captured_categories.append(message.__class__)
         else:
+            # as follows Python documentation at
+            # https://docs.python.org/3/library/warnings.html#warnings.warn
+            # if category is None, the default UserWarning is used
             if category is None:
                 category = UserWarning
             self._captured_categories.append(category)