How do I use contextlib in Python?

How do I use contextlib in Python?

You can use the contextlib module to simplify resource management. It provides utilities for working with context managers.

Can you give me an example of a context manager using contextlib?

Sure! Here's a simple example using contextlib.contextmanager:

from contextlib import contextmanager

@contextmanager
def my_context():
    print('Entering the context')
    yield
    print('Exiting the context')

with my_context():
    print('Inside the context')

What does the yield statement do in that example?

The yield statement allows you to define a point where the context is entered and exited. Code before yield runs when entering, and code after runs when exiting.

Are there any built-in context managers in Python?

Yes, Python has built-in context managers like open() for file handling and threading.Lock() for thread synchronization.