WTF??

#!/usr/bin/env python
from __future__ import division
from collections import namedtuple
Coordinate = namedtuple("Coordinate", ["X", "Y", "Z"])
def elementWiseAdd(coord1, coord2): return Coordinate(coord1[0]+coord2[0], coord1[1]+coord2[1], coord1[2]+coord2[2])
def elementWiseSub(coord1, coord2): return Coordinate(coord1[0]-coord2[0], coord1[1]-coord2[1], coord1[2]-coord2[2])
def elementWiseDiv(coord, scale): return Coordinate(coord[0]/scale, coord[1]/scale, coord[2]/scale)
Coordinate.__add__ = elementWiseAdd 
Coordinate.__sub__ = elementWiseSub
Coordinate.__div__ = elementWiseDiv

class BoundingBox(object):
    def __init__(self, boundingStartPoint, boundingEndPoint, resolution):
        self.resolution = resolution
        self.startPoint = boundingStartPoint
        self.endPoint = boundingEndPoint
        dx = boundingEndPoint.X - boundingStartPoint.X
        dy = boundingEndPoint.Y - boundingStartPoint.Y
        dz = boundingEndPoint.Z - boundingStartPoint.Z
        stepsX = int(abs(dx/resolution) + 1)
        stepsY = int(abs(dy/resolution) + 1)
        stepsZ = int(abs(dz/resolution) + 1)
        self.visitedTable = [[[False] * stepsZ] * stepsY] * stepsX

    def __coordToIndices(self, coordinate):
        delta = coordinate - self.startPoint
        import ipdb; ipdb.set_trace()
        stepCount = delta + delta
        stepCount = delta/self.resolution
        #Seems silly but we're not returning a Coordinate so I'm "un-typing" it
        return (stepCount[0], stepCount[1], stepCount[2])

    def haveVisited(self,coordinate):
        ind = self.__coordToIndices(coordinate)
        return self.visitedTable[ind[0]][ind[1]][ind[2]]

if __name__ == "__main__":
    foo = BoundingBox(Coordinate(0,0,0), Coordinate(1,1,0.5), 0.5)
    print foo.haveVisited(Coordinate(0,1,0))