Tuple and namedtuple

Tuple and namedtuple#

Tuple#

  1. Tuples are immutable data structure. They are homogeneous/heterogeneous.

  2. Order have meaning.

  3. Tuple are faster than list.

Note

What defines tuple is not parenthesis but a comma.

eg:

tup = 1,
num = (1)
type(tup), type(num)

(tuple, int)

Namedtuple#

  • It is just a fancy way to instanciating a tuple object so that we can access the element using dot notation like in python classes.

  • It is class generator.

  • Inherits the tuple class.

from collections import namedtuple

x = ['x','y'] # or ('x','y) or "x y" or "x,y"
Point2d =namedtuple('Point2d',x)

coord = Point2d(10,20)

coord

Point2d(x=10, y=20)

Accessing Data in named tuple#

x,y = coord

# or
x = coord[0]
y = coord[1]

# or using field name
x = coord.x
y = coord.y

print(x,y,sep=",")

10,20

isinstance(coord,tuple)

True

Person = namedtuple("Person","name email address contact religion education")
Person._fields

('name', 'email', 'address', 'contact', 'religion', 'education')