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    Here’s my attempt at edit and continue for Python. (It would also work inside a function.)

    Here’s another one I’m aware of (I haven’t found the source for it).

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      How does this compare with Mathematica, Maple, and other interactive notebook programs? It reminds me very much of using Maple 15+ years ago.

      This is also very much how I use the REPL in Common Lisp environments, albeit a little differently. You have access to previous computations and values with the symbols *, **, ***, and +, ++, +++ so you can manipulate access recent history and try things again.