pycheckio Building Base题解

pycheckio的一道题，太长了，所以不复制过来了。主要是构造类，然后在类中构造方法，难点是方法中返回一个字典，目前没有找到除了硬写一个字典以外更好的办法

#!/usr/bin/env checkio --domain=py run building-base

class Building:
    def __init__(self, south, west, width_WE, width_NS, height=10):
        self.south = south
        self.west = west
        self.width_WE = width_WE
        self.width_NS = width_NS
        self.height = height

    def corners(self):
        north_west = [self.south + self.width_NS, self.west]
        north_east = [self.south + self.width_NS, self.west + self.width_WE]
        south_west = [self.south, self.west]
        south_east = [self.south, self.west + self.width_WE]
        corner = {"north-west": north_west, "north-east": north_east, "south-west": south_west,
                  "south-east": south_east}
        return corner

    def area(self):
        return self.width_NS*self.width_WE

    def volume(self):
        return self.area()*self.height

    def __repr__(self):
        return "Building({0}, {1}, {2}, {3}, {4})".format(self.south, self.west, self.width_WE, self.width_NS, self.height)


if __name__ == '__main__':
    #These "asserts" using only for self-checking and not necessary for auto-testing
    def json_dict(d):
        return dict((k, list(v)) for k, v in d.items())

    b = Building(1, 2, 2, 3)
    b2 = Building(1, 2, 2, 3, 5)
    assert json_dict(b.corners()) == {'north-east': [4, 4], 'south-east': [1, 4],
                                      'south-west': [1, 2], 'north-west': [4, 2]}, "Corners"
    assert b.area() == 6, "Area"
    assert b.volume() == 60, "Volume"
    assert b2.volume() == 30, "Volume2"
    assert str(b) == "Building(1, 2, 2, 3, 10)", "String"