[john-titor]

Atom + Hydrogen allowed for line by line execution and immediate output in regular .py files, no cell definitions needed. Haven't seen this functionality anywhere else yet and miss it a lot. If anyone knows an alternative, please let me know.

[pjmlp]

Smalltalk and Common Lisp IDEs were the very first offering similar capabilities.

[adammarples]

Spamming debugger breakpoints everywhere in pycharm