How to use the mirage.proj.MirageEnvironment function in mirage

def __db_connect():
        return MirageEnvironment.search_project_root() + "/.mirage/mirage_workspace.sqlite3"

def load_miragefile(self):

        with MirageEnvironment(MirageEnvironmentLevel.inproject):
            pass

def __init__(self, file_type = None):

        with proj.MirageEnvironment(proj.MirageEnvironmentLevel.inproject):
            if file_type == "secret":
                self._data = self._load_json("Miragefile.secret")
            elif file_type == "addon":
                self._data = self._load_json("Miragefile.addon")
            elif file_type == None:
                self._data = self._load_json("Miragefile")
            else:
                mys.log("Wrong configuration type {0}.".format(file_type), withError = True)

def main(self):
        with proj.MirageEnvironment(proj.MirageEnvironmentLevel.indjango):
            mys.log("Launching Django Python Shell")
            os.system("python manage.py dbshell")