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added acceptable keys to help user

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shimwell 2022-11-13 16:11:23 +00:00
parent dff3ad48f1
commit 2aef8052e9
1 changed files with 3 additions and 1 deletions
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4
openmc/config.py
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@ -42,7 +42,9 @@ class _Config(MutableMapping):
# Reset photon source data since it relies on chain file
_DECAY_PHOTON_ENERGY.clear()
else:
raise KeyError(f'Unrecognized config key: {key}')
raise KeyError(f'Unrecognized config key: {key}. Acceptable keys '
'are "cross_sections", "mg_cross_sections" and '
'"chain_file"')
def __iter__(self):
return iter(self._mapping)