ska_oso_oet.tango

The ska_oso_oet.tango module contains code that could be called from observing scripts. Primarily, this will involve interactions with ska_oso_oet.tango.TangoExecutor.

class ska_oso_oet.tango.TangoExecutor(proxy_factory=<ska_oso_oet.tango.TangoDeviceProxyFactory object>)

TangoExecutor is the proxy between calling code and Tango devices. It accepts encapsulated Tango interactions and performs them on behalf of the calling code.

__init__(proxy_factory=<ska_oso_oet.tango.TangoDeviceProxyFactory object>)

Create a new TangoExecutor.

Parameters:

proxy_factory – a function or object which, when called, returns an object that conforms to the PyTango DeviceProxy interface.

execute(command: Command, **kwargs)

Execute a Command on a Tango device.

Additional kwargs to the DeviceProxy can be specified if required.

Parameters:

command – the command to execute

Returns:

the response, if any, returned by the Tango device

read(attribute: Attribute)

Read an attribute on a Tango device.

Parameters:

attribute – the attribute to read

Returns:

the attribute value

read_event(attr: Attribute) → tango.EventData

Get an event for the specified attribute.

subscribe_event(attribute: Attribute)

Subscribe event on a Tango device.

Parameters:

attribute – the attribute to subscribe to

Returns:

subscription ID

unsubscribe_event(attribute: Attribute, event_id: int)

unsubscribe event on a Tango device.

Parameters:

• attribute – the attribute to unsubscribe

• event_id – event subscribe id

Returns:

class ska_oso_oet.tango.Attribute(device: str, name: str)

An abstraction of a Tango attribute.

__init__(device: str, name: str)

Create an Attribute instance.

Parameters:

• device – the FQDN of the target Tango device

• name – the name of the attribute to read

class ska_oso_oet.tango.Command(device: str, command_name: str, *args, **kwargs)

An abstraction of a Tango command.

__init__(device: str, command_name: str, *args, **kwargs)

Create a Tango command. :param device: the FQDN of the target Tango device :param command_name: the name of the command to execute :param args: unnamed arguments to be passed to the command :param kwargs: keyword arguments to be passed to the command