In [1]:

    

# https://docs.python.jp/3/library/collections.html#collections.namedtuple


    

In [2]:

    

from collections import namedtuple


    

In [3]:

    

Point = namedtuple('Point', ['x', 'y'])


    

In [4]:

    

print(Point)


    

    




<class '__main__.Point'>

In [5]:

    

p1 = Point(1, 2)
print(p1)
print(type(p1))


    

    




Point(x=1, y=2)
<class '__main__.Point'>

In [6]:

    

print(p1.x, p1.y)
print(p1[0], p1[1])


    

    




1 2
1 2

In [7]:

    

p_new = p1._replace(x=10)
print(p1)
print(p_new)


    

    




Point(x=1, y=2)
Point(x=10, y=2)

In [8]:

    

p_d = p1._asdict()
print(p_d)
print(type(p_d))


    

    




OrderedDict([('x', 1), ('y', 2)])
<class 'collections.OrderedDict'>

In [9]:

    

print(Point._fields)


    

    




('x', 'y')

In [10]:

    

Point_3D = namedtuple('Point_3d', Point._fields + ('z', ))


    

In [11]:

    

print(Point_3D)


    

    




<class '__main__.Point_3d'>

In [12]:

    

p_3d = Point_3D(1, 2, 3)
print(p_3d)
print(type(p_3d))


    

    




Point_3d(x=1, y=2, z=3)
<class '__main__.Point_3d'>

In [13]:

    

p2 = Point(3, 4)
print(p2)


    

    




Point(x=3, y=4)

In [14]:

    

p = p1 + p2
print(p)
print(type(p))


    

    




(1, 2, 3, 4)
<class 'tuple'>

In [15]:

    

class Point_a(namedtuple('Point_a', ['x', 'y'])):
    def __add__(self, other):
        return Point_a(self.x + other.x, self.y + other.y)


    

In [16]:

    

p1_a = Point_a(1, 2)
p2_a = Point_a(3, 4)
print(p1_a)
print(p2_a)


    

    




Point_a(x=1, y=2)
Point_a(x=3, y=4)

In [17]:

    

p_a = p1_a + p2_a
print(p_a)


    

    




Point_a(x=4, y=6)