def open():
        """
        Return a file-like object opened for reading.

        Reading from the returned file will return all the bytes of which this
        message consists.
        """

        Return a file-like object opened for reading.

        Reading from the returned file will return all the bytes of which this
        message consists.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/mail/interfaces.py