Python + Django + Pythonanywhere if I want to very quickly test an idea and make the prototype available on the internet instantly. As the project grows bigger,

Python + Django + Pythonanywhere if I want to very quickly test an idea and make the prototype available on the internet instantly. As the project grows bigger, I would switch to PyCharm. If I need a front end, or easy to set up background jobs, or I don't need an admin interface much, I choose Clojure / CLJS and Emacs + CIDER.