https://www.khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:automating-tasks-with-lists/x5279a44ae0ab15d6:list-mutation/a/list-methods 2026-02-17T23:20:43.373798125Z List methods Learn the built-in methods for adding and removing elements from a list. article https://www.khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:automating-tasks-with-lists/x5279a44ae0ab15d6:list-mutation/v/pass-by-assignment 2025-05-13T01:54:17.407395406Z Pass by assignment What happens when you pass a list as an argument to a function? Python passes arguments by assignment, so mutating a list parameter inside a function can have side effects! Trace how the computer handles mutable and immutable argument types in memory. View the program used in this video at: https://www.khanacademy.org/python-program/pass-by-assignment/6084391505870848 Kim Merrill video https://cdn.kastatic.org/ka_thumbnails_cache/9b70ceee-b5a6-430e-be2e-29be65c5debb_1280_720_base.png Pass by assignment What happens when you pass a list as an argument to a function? Python passes arguments by assignment, so mutating a list parameter inside a function can have side effects! Trace how the computer handles mutable and immutable argument types in memory. View the program used in this video at: https://www.khanacademy.org/python-program/pass-by-assignment/6084391505870848 https://cdn.kastatic.org/ka-youtube-converted/Ifw30qzDj3M.mp4/Ifw30qzDj3M.mp4 270 List mutation https://www.khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:automating-tasks-with-lists/x5279a44ae0ab15d6:list-mutation/a/accumulator-pattern 2025-05-13T01:54:17.407395406Z Accumulator pattern Explore common list applications for the accumulator pattern. article https://www.khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:automating-tasks-with-lists/x5279a44ae0ab15d6:list-mutation/e/trace-list-mutations 2025-09-12T02:00:44.915137743Z Trace list mutations Trace list mutations using list methods. Nathaniel Shak exercise https://www.khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:automating-tasks-with-lists/x5279a44ae0ab15d6:list-mutation/v/program-design-flight-delays 2025-05-13T01:54:17.407395406Z Program design: flight delays Code along with a software engineer in this worked example using lists, strings, and CSV data. Apply the accumulator pattern to compare average departure delays across different airlines. Use separation of concerns to decouple the data normalization from the data analysis. View the program used in this video at: https://www.khanacademy.org/python-program/flight-delays/4887611669856256 Kim Merrill video https://cdn.kastatic.org/ka_thumbnails_cache/fc57de3c-503a-4a3c-84ac-8efc9d4fa6e7_1280_720_base.png Program design: flight delays Code along with a software engineer in this worked example using lists, strings, and CSV data. Apply the accumulator pattern to compare average departure delays across different airlines. Use separation of concerns to decouple the data normalization from the data analysis. View the program used in this video at: https://www.khanacademy.org/python-program/flight-delays/4887611669856256 https://cdn.kastatic.org/ka-youtube-converted/4hMeMtgF81o.mp4/4hMeMtgF81o.mp4 339 List mutation https://www.khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:automating-tasks-with-lists/x5279a44ae0ab15d6:list-mutation/pc/challenge-order-forms 2025-07-29T19:47:11.362406901Z Challenge: Order forms Practice list mutations to process user responses to a T-shirt order form. challenge