What Python’s "with" statement really does (and why it matters)

Published: 06 November 2023
on channel: Python and Pandas with Reuven Lerner

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You’ve probably used `with open(...) as f:` in Python. But what does the `with` statement really do behind the scenes?

In this video, I break down:
What the `with` statement actually triggers in Python
Why files need to be flushed and closed properly
How the context manager protocol (`__enter__` and `__exit__`) works
How to write your own context manager using a class
Why `with` is Python’s go-to tool for safe, predictable cleanup — from files to logs to database transactions

Whether you’ve used `with` a hundred times or never really thought about it, this video will give you a deeper understanding of how Python works — and how to use it more confidently.

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