Python-сообщество

class Point:
	def __init__(self, x = 0, y = 0):
		self.x = x
		self.y = y
	def distance(self, point):
		return sqrt((self.x - point.x) ** 2 + (self.y - point.y) ** 2)

newKernel = Point()
newKernel.x = 0
for point in group:
	newKernel.x += point.x
newKernel.x /= len(group)

class Point:

    def __init__(self, x = 0, y = 0):
        self.x = x
        self.y = y

    def distance(self, point):
        return sqrt((self.x-point.x)**2+(self.y-point.y)**2)

    def __str__(self):
        return "Point(%d,%d)" % (self.x, self.y)


def mass_center(points):
    if points:
        return Point(sum(pt.x for pt in points)/len(points),
                sum(pt.y for pt in points)/len(points))


group = [Point(10,10),Point(10,20),Point(20,25),Point(30,20),Point(30,10)]
print mass_center(group)

class Point:
    def __init__(self, x = 0, y = 0):
        self.x = x
        self.y = y
    def __add__(self, point):
        return Point( self.x+point.x, self.y+point.y )
    def __repr__(self):
        return "Point({},{})".format( self.x, self.y )

a, b = Point(1,2), Point(3,4)
print(a+b)