8.2. Nested List of Tuples

Important

• Iterable is an object

• Iterable element is an object too

• Therefore an element of a Iterable could be another Iterable

• There is no limit how nested it could be

Examples:

✘

>>> users = [
...     ('Mark', 'Watney'),
...     ('Melisa', 'Lewis'),
...     ('Rick', 'Martinez'),
... ]

8.2.1. Format

• Readability differs depending on whitespaces

✘

>>> data = [
...     ('Mark', 'Watney'),
...     ('Melisa', 'Lewis'),
...     ('Rick', 'Martinez'),
... ]

✘

>>> data = [
...     ('Mark', 'Watney'),
...     ('Melisa', 'Lewis'),
...     ('Rick', 'Martinez')]

✘

>>> data = [('Mark', 'Watney'),
...         ('Melisa', 'Lewis'),
...         ('Rick', 'Martinez')]

8.2.2. Length

✘

>>> data = [
...     ('Mark', 'Watney'),
...     ('Melisa', 'Lewis'),
...     ('Rick', 'Martinez'),
... ]

✘

>>> len(data)
3

✘

>>> len(data[0])
2

✘

>>> len(data[0][1])
6

8.2.3. Assignments