-def find(seq, *, item=None, match=None, key=None, default=LookupError):
- if key is None:
- key = lambda o: o
- if match is None and item is not None:
- match = lambda o: o == item
- for thing in seq:
- if match(key(thing)):
- return thing
- if default is LookupError:
- raise LookupError()
- else:
- return default
-