Returned type should be int not float

[GreatBahram]

Hello there,
I think, you should modify the type hints, since the xdist and ydist are both integer, so sum of them is going to be integer too, right?

ClassicComputerScienceProblemsInPython/Chapter2/maze.py

Lines 100 to 105 in 57d5f94

	def manhattan_distance(goal: MazeLocation) -> Callable[[MazeLocation], float]:
	def distance(ml: MazeLocation) -> float:
	xdist: int = abs(ml.column - goal.column)
	ydist: int = abs(ml.row - goal.row)
	return (xdist + ydist)
	return distance

[davecom]

Probably; we return float because we want consistency with Euclidean distance, and so that the type hints match with the heuristic parameter of astar(). The alternative is a float() conversion at the end of distance().

Thanks for pointing this out.