Python · Context Managers

You want code to optionally run inside a context manager (e.g. redirect stdout only sometimes). What goes in the "do nothing" branch?

Answer locked. Get the free KnowCard app to reveal it — plus spaced-repetition review so it actually sticks.

This is one card from the KnowCard library — thousands more across SAP, Linux, Python and more. In the app you get the answer, AI explanations, and cards that come back right before you would forget them. Free to start on iOS, Android or the web.

More in Context Managers

A context manager class must implement which two magic methods, and when is each called?

Why prefer with open(...) as f: over f = open(...) followed by manual cleanup?

In with EXPR as name:, what gets bound to name — the object in EXPR, or something else?

If the with body raises an exception, does __exit__ still run?

What are the three arguments passed to __exit__, and what are they when no exception occurred?

Inside __exit__, what does returning True do to an exception raised in the with body?

Start learning today

Free to start — download the app or use it in your browser.

You want code to *optionally* run inside a context manager (e.g. redirect stdout only sometimes). What goes in the "do nothing" branch?

More in Context Managers

Start learning today

You want code to optionally run inside a context manager (e.g. redirect stdout only sometimes). What goes in the "do nothing" branch?