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How do you implement custom context managers?

Mid Python
Quick Answer Custom context managers: class-based: implement __enter__ and __exit__. __exit__ receives exception info (exc_type, exc_val, exc_tb) and can suppress exceptions by returning True. Function-based (simpler): use @contextlib.contextmanager decorator, yield once (code before yield = __enter__, after yield = __exit__). contextlib.ExitStack manages multiple context managers dynamically.

Answer

Define __enter__ and __exit__ methods.
Or use contextlib for simplified managers.
Ensures proper cleanup of resources.
S
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