26 lines
626 B
Python
26 lines
626 B
Python
from typing import Iterable, Set
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models = None
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DL_ATOMS = "abc"
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def set_models(alphabet: Iterable[str], v: Iterable[Iterable[str]]):
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global models, DL_ATOMS
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DL_ATOMS = "".join(alphabet)
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models = tuple(set(model) for model in v)
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def propagate(atoms: Set[str]) -> Set[str]:
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atoms = atoms.intersection(DL_ATOMS)
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sub_models = (model for model in models if atoms <= model)
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first: set = next(sub_models, None)
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if first is None:
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return set()
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return first.intersection(*sub_models)
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def check(atoms: Set[str]) -> bool:
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atoms = atoms.intersection(DL_ATOMS)
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return atoms in models
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