polar_cell.py

from cell import Cell

class PolarCell(Cell):
    def __init__(self, row, column):
        Cell.__init__(self, row, column)
        self.outward = []
        self.cw = None
        self.ccw = None
        self.inward = None

    def neighbors(self):
        list = []
        if self.cw: list.append(self.cw)
        if self.ccw: list.append(self.ccw)
        if self.inward: list.append(self.inward)
        list += self.outward
        return list