>>> #
... # Class for 2D Point Coordinates
... #
... class Coord:
...    "2D Point Coordinates"
...    def __init__(self, x=0, y=0):
...        self.x = x
...        self.y = y
... #
... # Method describe produces a string representation of a 2D point
... #
...    def describe(self):
...        return '('+str(self.x)+','+str(self.y)+')'
... #
... # Method euclid computes the Euclidean distance from a point to a second one
... #
...    def euclid(self,p2):
...        return ((self.x-p2.x)**2+(self.y-p2.y)**2)**0.5
... #
... # Method for point equality
... #
...    def same(self,p2):
...       if self.euclid(p2) < .0001:
...          return True
...       return False
... #
... # Method for add
... #
...    def add(self,p2):
...       return(Coord(self.x+p2.x,self.y+p2.y))
...
>>> a = Coord(1,2)
>>> b = Coord(3,4)
>>> a.describe()
'(1,2)'
>>> b.describe()
'(3,4)'
>>> c = a.add(b)
>>> c.describe()
'(4,6)'
>>>