Context manager for your context managers

manager.py

import sys
import contextlib


@contextlib.contextmanager
def context_manager_manager(*managers):
    for manager in managers:
        manager.__enter__()
    err = (None, None, None)
    try:
        yield
    except Exception:
        err = sys.exc_info()
        raise
    finally:
        for manager in reversed(managers):
            manager.__exit__(*err)



if __name__ == "__main__":

    @contextlib.contextmanager
    def demo(message):
        print(" IN ->", message)
        yield
        print("OUT ->", message)


    with context_manager_manager(
        demo("one"), demo("    two"), demo("        three")
    ):
        print(" ==== INSIDE! ====")