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


def is_numeric(x):

    ile = len(x)
    licznik = 0

    for i in x:
        if isinstance(i, (int, float)):
            licznik += 1

    if ile == licznik:
        return True
    else:
        return False


def add_coordinates(c1, c2):
    new = []
    if len(c1) == len(c2):
        for i in range(0, len(c1)):
            new.append(c1[i]+c2[i])
    return new


class DimensionError(Exception):
    def __init__(self, text):
        self.text = text

    def __str__(self):
        return self.text


class Point:
    def __init__(self, coordinates):

        if not is_numeric(coordinates):
            raise Exception('Lista zawiera wartosci nieliczbowe')
        self.coordinates = coordinates

        self.coordinates_to_string = 'Koordynaty punktu: ['
        for c in coordinates:
            self.coordinates_to_string += str(c) + ', '
        self.coordinates_to_string = self.coordinates_to_string[:-2]
        self.coordinates_to_string += ']'

    def to_string(self):
        print(self.coordinates_to_string)

    def __str__(self):
        return self.coordinates_to_string

    def __add__(self, other):
        if len(self.coordinates) != len(other.coordinates):
            raise DimensionError('Punkty maja rozne wymiary')

        return Point(add_coordinates(self.coordinates, other.coordinates))

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


a = Point([1, 1, 5])
b = Point([2, 4, 4])

print(a)
b.to_string()
print(len(b))

c = a + b
print(c)