Python - Immutable Types

Youtube by ‘Real Python’

Immutability: You can access the item and values it contains, but you cannot change them

In python if you want an immutable array, or list, u can use the tuple, or even if you want one single element to be immutable. Immutable data have some interesting properties.

a = tuple((1,)) #IMMUTABLE ELEMENT
b = tuple((1,2,3)) #IMMUTABLE LIST

---

You can create any new type of immutable structure, or type using the collections module:

#MUTABLE DATA EXAMPLE:
scientists = [
	{'name': 'Ada Lovelace', 'field': 'math', 'born': 1815, 'nobel': False}
	{'name': 'Emy Noether', 'field': 'math', 'born': 1882, 'nobel': False}
]
#And you can access it using:
first_scientis_name = scientists[0]['name']

import collection
Scientist = collections.namedtuple('Scientist',
	('name', 'field', 'born', 'field'))
ada = Scientist(name = 'Ada Lovelace', 
	field = 'math', born = 1815, nobel = False)
 
#if you want to access data:
print(ada.name)
#>>> 'Ada Lovelace'
 
# COMPLEATLY IMMUTABLE LIST OF STRUCTURES
scientists = tuple((
	Scientist(name = 'Ada Lovelace', 
		field = 'math', born = 1815, nobel = False),
	Scientist(name = 'Emy Noether', 
		field = 'math', born = 1882, nobel = False),
))