add prune_empty and delete()
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8c42145e44
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@ -799,6 +799,35 @@ class MutableLibrary(Library, MutableMapping[str, 'Pattern'], metaclass=ABCMeta)
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new._merge(key, self, key)
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return new
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def prune_empty(
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self,
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repeat: bool = True,
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) -> Set[str]:
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# TODO doc prune_empty
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trimmed = set()
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while empty := set(name for name, pat in lib.items() if pat.is_empty()):
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for name in empty:
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del lib[name]
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for pat in lib.values():
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pat.refs = [ref for ref in pat.refs if ref.target not in empty]
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trimmed |= empty
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if not repeat:
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break
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return trimmed
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def delete(
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self: ML,
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key: str,
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delete_refs: bool = True,
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) -> ML:
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# TODO doc delete()
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del self[key]
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if delete_refs:
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for pat in lib.values():
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pat.refs = [ref for ref in pat.refs if ref.target != key]
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return self
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class WrapROLibrary(Library):
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mapping: Mapping[str, 'Pattern']
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