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Re:What Happened to Lee by cat199 on Wednesday April 15, 2020 @08:18PM (#22884744)
not OP but likely:

1) coding via repl - e.g. one emacs buffer has stored procedure code, send functions over via keyboard shortcut to SQL repl buffer connected to DB to evaluate it 'live' (jupyter notebooks are basically a copy of this mode of operation in a more consumer-friendly package)

2) w/r/t python in db, as OP mentions pgsql, pgsql has support for in-db extensibility using a variety of languages, of which python is one: https://www.postgresql.org/docs/current/plpython.html probably referring to this

Re:What Happened to Lee by tomrod on Wednesday April 15, 2020 @08:21PM (#22884770)
Thanks!