It’s actually very useful to have context managers outlive their with blocks. They are not only used for files: One example would be a timing context manager:

It’s actually very useful to have context managers outlive their with blocks. They are not only used for files: One example would be a timing context manager: with Timer() as t: … print(t.runtime) Another example is mocks, where you want to inspect how many times a mock was called and with what arguments, after the mock context manager has finished.