Question

how can we create an app using python

Answer 1

You can create a complete Python application with a simple text editor and the Python interpreter.

Of course, more computing resources will be usefu if you intend to create a large application, or an application with a graphical user interface (GUI), with buttons, windows, etc., or maybe an application for a mobile system.

In that case, people usually prefer an IDE, aka Integrated Development System, that besides a simple editor, will offer many or all of the tools you need to create a large or complex application.

But even in this case, a simple text editor could still be used, since most of the resources that a complex application uses are mostly text files.

And indeed, some experienced programmers prefer to use just a simple text editor for everything related to Python programming.