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

    def __init__(self, coords):
        if is_numeric(coords):
            self.coords = coords
            print(self.coords)

    def to_string(self):
        print("coords:")
        print(self.coords)

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

    def __str__(self):
        return "coords: [" + ','.join([str(c) for c in self.coords]) + "]"

class DimensionError(Exception):
    def __init__(self, message):
        super(DimensionError, self).__init__(message)


def add(point1, point2):
    if len(point1.coords) != len(point2.coords) or len(point1.coords) == 0 or len(point2.coords) == 0:
        raise DimensionError('Wrong dimensions!')

    newCoords = []
    for dim in zip(point1.coords, point2.coords):
        newCoords.append(sum(dim))
    return Point(newCoords)

def is_numeric(coords):
    for el in coords:
        if not isinstance(el, (int, float)):
            return False
    return True

if __name__ == '__main__':
    point1 = Point([1,2,3,4,5])
    point2 = Point([1,2,3,4,5])

    point = add(point1, point2)
    # point.to_string()

    print(len(point))
    print(point)