Context managers simplify resource management using the `with` statement. Implement custom context managers with `__enter__` and `__exit__` methods or use the `contextlib` module.

Context managers in Python provide a convenient way to manage resources, ensuring that they are properly allocated and released. The most common use of context managers is with the with statement, which automatically handles setup and teardown operations for resources like file handling, network connections, and database sessions. You can implement custom context managers by defining a class with __enter__ and __exit__ methods, which handle resource allocation and cleanup, respectively. For example:

class MyContextManager:
    def __enter__(self):
        # Setup code
        return self

    def __exit__(self, exc_type, exc_value, traceback):
        # Teardown code

Alternatively, the contextlib module provides utilities to create context managers more easily using the contextmanager decorator. This approach allows you to define a generator function that yields control to the with statement. By leveraging context managers, you ensure that resources are properly managed, reducing the risk of resource leaks and making your code cleaner and more maintainable.