traitlets package (https://traitlets.readthedocs.io/en/stable/), originated from IPython, implements a powerful configuration system. This system is used throughout the project, but it can also be used by IPython extensions. It could even be used in entirely new applications.
In this recipe, we show how to use this system to write a configurable IPython extension. We will create a simple magic command that displays random numbers. This magic command comes with configurable parameters that can be set by the user in their IPython configuration file.
random_magics.pyfile. Let's start by importing a few objects:
>>> %%writefile random_magics.py from traitlets ...