This post explains what a Python module is and how to use it to drastically extend the capabiltiies of your code. Plus: how to make your own!

Python Import Mocker The Python Import Mocker provides an easy way to import a module and mock its dependencies in an isolated way. The mocking of the dependencies will apply only to the current ...

The only time to pickle something is if you need to represent a non-string object on disk, but Python code is strings. I presume that the receiving program is basically calling eval (skt.recv ()).