How can I debug contextlib errors in Python?

I'm getting an error when using contextlib in my Python code. How can I debug it?

Debugging contextlib errors often involves checking the context manager's implementation. Can you share the error message?

The error says 'RuntimeError: generator didn't yield'. What does that mean?

This error usually means that your generator function didn't yield a value as expected. Make sure your function has a yield statement.

I see. I forgot to include the yield. How can I properly implement a context manager using contextlib?

You can use contextlib.contextmanager to create a context manager. Here's a simple example:

from contextlib import contextmanager

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