#!/usr/bin/env python2
# -*- coding: utf-8 -*-

class Point(object):
    def __init__(self, coords):
        from labs04.task01 import is_numeric
        assert is_numeric(coords)
        self.coords = coords

    def add(self, that):
        if len(self.coords) != len(that.coords):
            raise DimensionError('Niezgodne wymiary')
        else:
            pass
        return Point(map(lambda(a,b): a+b, zip(self.coords, that.coords)))

    def to_string(self):
        return type(self).__name__+'('+((',').join(map(str, self.coords)))+')'

    def len(self):
        return len(self.coords)

    def __len__(self):
        return len(self.coords)

    def __str__(self):
        return self.to_string()

    def __add__(self, other):
        return self.add(other)

class DimensionError(Exception):
    def __init__(self, msg):
        self.msg = msg
    def __str__(self):
        return self.msg

pt1 = Point([1,2,3.0,4.0])
pt2 = Point([-1, -2.0, -3, -4.0])
print(pt1 + pt2)