ContextManager
A context manager is a programming construct that defines setup and teardown actions to be executed before and after a block of code. It ensures resources such as files, locks, or network connections are acquired and released deterministically, even when errors occur.
In Python, the context management protocol requires defining __enter__ and __exit__ methods on an object. The with
Common usage examples include opening files, acquiring and releasing locks, managing database transactions, and creating temporary
Related concepts exist in other languages: for example, C# uses using with IDisposable, and Java provides try-with-resources