Clean Code in Python

Implementing context managers

In general, we can implement context managers like the one in the previous example. All we need is just a class that implements the __enter__ and __exit__ magic methods, and then that object will be able to support the context manager protocol. While this is the most common way for context managers to be implemented, it is not the only one.

In this section, we will see not only different (sometimes more compact) ways of implementing context managers but also how to take full advantage of them by using the standard library, in particular with the contextlib module.

The contextlib module contains a lot of helper functions and objects to either implement context managers or use some already provided ones that can ...