Looking for a "custom" script editor

[metulburr]

That is because pycharm is using its own embedded python interpreter instead of hte one you install things to with pip. You can modify which interpreter your project is using by going to File -> Settings -> Project <Name> -> Project Interpreter -> Project Interpreter drop down menu -> Show all -> + symbol to add your system interpreter

Or you could simply create a new project using the correct interpreter.
   

Well there are minimalistic out-of-the box editors, but with that you also lose features such as the specific one you are looking for.