In [1]:

    

class Point(object):
    pass

# class Point:
#     pass


    

In [5]:

    




    

In [ ]:

    

p = Point()


    

In [6]:

    

p.x = 10
p.y = 10


    

In [7]:

    

p.x


    

    
Out[7]:





10

In [8]:

    

p.y


    

    
Out[8]:





10

In [12]:

    

class Point(object):
    x = 10
    y = 10


    

In [13]:

    

p = Point()


    

In [14]:

    

p.x


    

    
Out[14]:





10

In [15]:

    

Point.x


    

    
Out[15]:





10

In [16]:

    

Point.y


    

    
Out[16]:





10

In [17]:

    

p.x = 20


    

In [18]:

    

p.x


    

    
Out[18]:





20

In [19]:

    

Point.x


    

    
Out[19]:





10

In [29]:

    

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


    

In [30]:

    

p = Point(10)


    

In [31]:

    

p.x


    

    
Out[31]:





10

In [32]:

    

p = Point(1, 1)


    

In [33]:

    

p.y


    

    
Out[33]:





1

In [34]:

    

import math
class Point(object):
    def __init__(self, x=0, y=0):
        self.x = x
        self.y = y
    def distance(self, other_point):
        return math.sqrt(
            (self.x + other_point.x) ** 2 + (self.y + other_point.y) ** 2
        )


    

In [35]:

    

p1 = Point(1, 1)
p2 = Point(4, 5)


    

In [36]:

    

p1.distance(p2)


    

    
Out[36]:





7.810249675906654

In [37]:

    

Point.distance(p1, p2)


    

    
Out[37]:





7.810249675906654

In [38]:

    

p2.distance(p1)


    

    
Out[38]:





7.810249675906654

In [39]:

    

p1 + p2


    

    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-39-a4b876bf3cd8> in <module>()
----> 1 p1 + p2

TypeError: unsupported operand type(s) for +: 'Point' and 'Point'

In [47]:

    

class Point(object):
    def __init__(self, x=0, y=0):
        self.x = x
        self.y = y
    def __add__(self, other):
        return Point(self.x + other.x, self.y + other.y)
    def __str__(self):
        return 'X: %s, Y: %s' % (self.x, self.y)
    def __repr__(self):
        return '<Point %s>' % str(self)


    

In [48]:

    

p1 = Point(1, 1)
p2 = Point(4, 3)


    

In [49]:

    

p1 + p2


    

    
Out[49]:





<Point X: 5, Y: 4>

In [ ]: