Open the connection if not already open.

        :return: True

def open(self):
        """
        Open the connection if not already open.

        :return: True
        """
        try:
            if self.conn.get_backend_pid():
                return True
        except psycopg2.InterfaceError as e:
            if str(e) == "connection already closed":
                # We already lost our connection. Attempt to reforge it.
                self.__reconnect__()
                if self.conn.get_backend_pid() >= 0:
                    return True # Resets it.
            else:
                raise e