What are “named tuples” in Python?

Question

Reading the changes in Python 3.1, I found something... unexpected:

The sys.version_info tuple is now a named tuple:

Answer 1

Everyone else has already answered it, but I think I still have something else to add.

Namedtuple could be intuitively deemed as a shortcut to define a class.

See a cumbersome and conventional way to define a class .

class Duck:
    def __init__(self, color, weight):
        self.color = color
        self.weight = weight
red_duck = Duck('red', '10')

    In [50]: red_duck
    Out[50]: <__main__.Duck at 0x1068e4e10>
    In [51]: red_duck.color
    Out[51]: 'red'

As for namedtuple

from collections import namedtuple
Duck = namedtuple('Duck', ['color', 'weight'])
red_duck = Duck('red', '10')

In [54]: red_duck
Out[54]: Duck(color='red', weight='10')
In [55]: red_duck.color
Out[55]: 'red'