Secret Recipes of the Python Ninja

How it works...

The concept of multiple interpreters is not dissimilar to multiprocessing. Each interpreter is (relatively) isolated from the others, like multiple processes; yet, externally, the system appears to be running just a single process. This means that system performance and resource use are significantly better than in true multiprocessing.

It also increases the security profile of the system, because there is some leakage between the different interpreters, such as file descriptors, built-in types, singletons, and underlying static module data. They don't require modifications to the isolation of processes to pass data or otherwise interact with the system.

Another benefit of subinterpreters is that they provide a method of Python ...