def doc_handle_transport(event):
    """Documentation for handlers bound to ``evt.EVT_CONN_OPEN`` or
    ``evt.EVT_CONN_CLOSE``.

    Parameters
    ----------
    event : events.Event
        Represents opening or closing a transport connection. Event
        attributes are:

        * ``address`` : the (host, port) of the remote as (str, int).
        * ``assoc`` : the
          :py:class:`association <pynetdicom.association.Association>`
          that is running the service that received the user identity
          negotiation request.
        * ``event`` : the event that occurred as ``namedtuple``.
        * ``timestamp`` : the
          `date and time <https://docs.python.org/3/library/datetime.html#datetime-objects>`_
          that the negotiation request was processed by the ACSE.
    """
    pass
