improve hint typing

parent 82745b47
......@@ -27,11 +27,11 @@ class Node:
_id = itertools.count(0)
def __init__(self):
def __init__(self) -> None:
self.id: int = next(self._id)
self.neighbors: Set['Node'] = set()
def __hash__(self):
def __hash__(self) -> int:
# to be usable in set an object must be hashable
# so we need to implement __hash__
# which must returm an int uniq per object
......
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