How do I write a null (no-op) contextmanager in Python?

Question

Sometimes I need a dummy context manager that does nothing. It can then be used as a stand-in for a more useful, but optional, context manager. For example:

ctx_         


        

Answer 1

For Python 2.7+ , you can use

import contextlib
with (lambda noop_func: contextlib.contextmanager(noop_func))(lambda: (yield))():
    print("hi")