List-of-lists
from class: Intro to Python Programming Definition A list-of-lists is a nested list where each element of the main list is itself a list. This structure allows for the creation of multi-dimensional arrays in Python.
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Predict what's on your test 5 Must Know Facts For Your Next Test A list-of-lists can be used to represent matrices, grids, or tables in Python. Accessing elements in a list-of-lists requires multiple indexing operations. List comprehensions can be used to flatten a list-of-lists into a single list. Iterating through a list-of-lists often involves nested loops. Modifying an element within a nested list requires specifying both the main and sublist indices. Review Questions How do you access the element at the second row and third column in a 2D list? What Python feature allows you to convert a nested list into a flat list? Explain how you would iterate through all elements of a nested list using loops.
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