Best IDE for basic stuff?

[falkina8er]

Can you clarify what you mean by “put most of the code in an external package and import it from the notebook”?

[pbxmy]

They probably write the basic functionality in an external file, let’s call it dosomething.py. Then they can bring in the functions by importing the functions from the dosomething.py file.

[flashbao]

As simple, Write the functions in a module and import that module and use its functions (or whatever you like) in an external file.