class ExampleContextManager:
    def __init__(self, value):
        print('Initializing')
        self.value = value


    def __enter__(self):
        print('Entering')
        return self


    def __exit__(self, exc_type, exc_value, exc_traceback):
        if exc_type is None:
            reason = 'normally'
        else:
            reason = f'because of an exception of type {exc_type.__name__}'

        print(f'Exiting {reason}')