Exemple d'utilisation de namedtuple

L'utilisation de namedtuple peut s'avérer plus rapide que la définition de classes (objets)

namedtuple-chemical_elements-01.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
from collections import namedtuple
 
ChemEl = namedtuple('Element', 'name atomic_number symbol group period atomic_weight')
# same as defining a class for elements 
 
hydrogen = ChemEl('hydrogen', 1, 'H', 1, 1, 1.008)
helium = ChemEl('helium', 2, 'He', 18, 1, 4.002602)
 
print(hydrogen.atomic_weight)
print(hydrogen.symbol)
 
print(hydrogen, type(hydrogen))
print(helium)

Module collections :

• https://docs.python.org/2/library/collections.html
• https://docs.python.org/3/library/collections.html
• https://docs.python.org/3/library/collections.html#collections.namedtuple