Names and objects

About this app

Assignment does not copy: Python programs run line by line, the names are in the middle and the objects on the right, and arrows show which name points to which object. After a = l1 there is one card and two arrows; a function call opens a frame with a third arrow to the same card. Five examples (two names, lists, rebinding, numbers, a real copy), and before every print the question “What does Python print?”.

Subject: Computer science

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