It's ExitStack.enter_context(), not enter(). https://docs.python.org/3/library/contextlib.html#contextlib.ExitStack.enter_context https://docs.python.org/3/lib

It's ExitStack.enter_context(), not enter(). https://docs.python.org/3/library/contextlib.html#contextlib.ExitStack.enter_context https://docs.python.org/3/library/contextlib.html#contextlib...