Lists & strings in Python | Khan Academy - Pass by assignment | Intro to CS - Python | Khan Academy

What happens when you pass a list as an argument to a function? Python passes arguments by assignment, not pass-by-value or pass-by-reference. Mutating a list parameter inside a function, then, 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 Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now with our Intro to Computer Science - Python course! Course link: https://www.khanacademy.org/computing/intro-to-python-fundamentals/x5279a44ae0ab15d6:automating-tasks-with-lists Course playlist: https://www.youtube.com/playlist?list=PLSQl0a2vh4HDkbhG0sDW0b-VZXykEIAe5 Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc TIMESTAMPS: 00:00 : passing a primitive type 00:40 : memory representation - float argument 01:09 : memory representation - list argument 01:41 : mutating the list argument 02:19 : immutable vs. mutable arguments 02:46 : risks of functions side effects 03:27 : accumulator pattern 03:48 : documenting side effects 04:12 : summary