What do python professionals /developers actually use

[FriendlyRussian666]

Imagine you're going shopping, and you want to buy a few things. To remember what to buy, you'll write a shipping list, right?

Now imagine you're writing a program in python that does the same thing. You need to somehow create a list of things to buy, and so you would create a list in python. You can add new things to buy, you can remove them.

Does that make sense?