<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def open_required(func):
 """ Use this decorator to raise an error if the project is not opened """


    def wrapper(self, *args, **kwargs):
        if self._status == "closed":
            raise aiohttp.web.HTTPForbidden(text="The project is not opened")
        return func(self, *args, **kwargs)
    return wrapper