from fileio import open

class ContextManager:
    def __init__(title):
        self.title = title
    def __enter__():
        print("Enter context manager", self.title)
    def __exit__(type,value,traceback):
        print("Exit context manager", self.title)


def doesThing():
    print("Creating CM")
    let cm = ContextManager('simple')

    with cm:
        print("In context manager")
        return 42

    print("Not exiting correctly?")
    return "oh no"

print(doesThing())


def doesANestedThing():
    with ContextManager('outer'):
        with ContextManager('inner'):
            with ContextManager('triple'):
                return 42
            print('Should not print')
        print('Should not print')
    print('Should not print')

print(doesANestedThing())