ulkb.Theory.lookup_type_constructor#
- Theory.lookup_type_constructor(arg, default=<class 'ulkb.util.Nil'>)[source]#
Searches for type constructor.
If default is given, returns it instead of raising an exception.
- Parameters:
arg – Id or
TypeConstructor
.default – Value.
- Returns:
- Raises:
LookupError – arg not in theory.
See also