from typing import Any


class box:
    def __init__(self):
        self.__dict__['center'] = [2,3]
        self.__dict__['size'] = [4,6]
    def __getattr__(self, name):
        if name in self.__dict__: return self.__dict__[name]
        cx,cy = self.center
        w,h = self.size
        if name == 'left': return cx-w/2
        if name == 'right': return cx + w/2
        if name == 'top': return cy - h/2
        if name == 'bottom': return cy + h/2
        if name in ('x','cx','centerx','xcenter'): return cx
        if name in ('y','cy','centery','ycenter'): return cy
        if name in ('w', 'width'): return w
        if name in ('h', 'height'): return h
    def __setattr__(self, name, value):
        if name in self.__dict__:
            self.__dict__[name] = value
            return
        cx,cy = self.center
        w,h = self.size
        if name == 'left': self.center[0] = value + w/2
        elif name == 'right': self.center[0] = value - w/2
        elif name == 'top': self.center[1] = value + h/2
        elif name == 'bottom': self.center[1] = value - h/2
        elif name in ('x','cx','centerx','xcenter'): self.center[0] = value
        elif name in ('y','cy','centery','ycenter'): self.center[1] = value
        elif name in ('w', 'width'): self.size[0] = value
        elif name in ('h', 'height'): self.size[1] = value
        else:
            print("WARNING: adding ."+name,'to box object')
            self.__dict__[name] = value
    def __str__(self):
        return '{}×{} box at ({},{})'.format(self.w,self.h,self.x,self.y)

b = box()
print(b)
print(b.bottom)
b.bottom = 100
print(b.bottom)
print(b.top)
print(b)