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Skip config loading for Configurables with no matching config #969

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Merged
Carreau merged 1 commit into from
Aug 4, 2026
+7 −4
Merged

Skip config loading for Configurables with no matching config #969

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11 changes: 7 additions & 4 deletions traitlets/config/configurable.py
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Original file line number Diff line number Diff line change
Expand Up @@ -171,12 +171,15 @@ def _load_config(
) -> None:
"""load traits from a Config object"""

my_config = self._find_my_config(cfg)
if not my_config:
# Nothing in the config applies to this instance; avoid the cost of
# computing traits() and entering hold_trait_notifications() for the
# many leaf Configurables that carry no matching config.
return

if traits is None:
traits = self.traits(config=True)
if section_names is None:
section_names = self.section_names()

my_config = self._find_my_config(cfg)

# hold trait notifications until after all config has been loaded
with self.hold_trait_notifications():
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