(self, dev)
r"""Open the device for data exchange.

        This method opens the device identified by the dev parameter for communication.
        This method must be called before calling any communication related method, such
        as transfer methods.

        It returns a handle identifying the communication instance. This handle must be
        passed to the communication methods.
r"""Open the device for data exchange.
r Open the device for data exchange .
def open_device(self, dev):
        r"""Open the device for data exchange.

        This method opens the device identified by the dev parameter for communication.
        This method must be called before calling any communication related method, such
        as transfer methods.

        It returns a handle identifying the communication instance. This handle must be
        passed to the communication methods.
        """
        _not_implemented(self.open_device)
def open_device ( self , dev ) : _not_implemented ( self . open_device )