Source: 📖 Effective Python item 6

Use multiple assignment unpacking to unpack iterables in loops

Indexing into the items within an iterable over a loop is very visually noisy.

fam_info = [
	('Juan', 'Coquet', '01/12/1995'),
	('Mariela', 'Diaz', '26/10/1967'),
	]

for person in fam_info:
	first = person[0]
	last = person[1]
	dob = person[2]
	
	print(first, last, dob)

>>>
Juan Coquet 01/12/1995
Mariela Diaz 26/10/1967

Instead, items can be unpacked within the initial for expression:

truncated...

for first, last, dob in fam_info:
	print(first, last, dob)
	
>>>
Juan Coquet 01/12/1995
Mariela Diaz 26/10/1967

This is the pythonic way of writing such code—it's terse, yet it improves readability.

See also:

• Multiple assignment unpacking explained