What is a Python context manager and what dunder methods must a class implement to support `with`?

Question

Python Developer — Hard

What is a Python context manager and what dunder methods must a class implement to support `with`?

Accepted Answer

A Python context manager is an object that manages setup and teardown around a block of code. It must implement __enter__ (called at with-block entry) and __exit__ (called at exit, can handle exceptions). This allows for resource management and exception handling within the context.