def get_systems(engine=get_engine()):
'''Returns all the :class:`~tng.device.abc_device.ABCDevice` that TNG pi
has created.
They are loosely ordered in that all targets come first, then all refs.
'''
return get_targets(engine) + get_refeps(engine)
def get_system(name, engine=get_engine()):
'''Gets a TNG pi :class:`~tng.device.abc_device.ABCDevice` by setup file
name, or raises :class:`KeyError` if not found.
>>> get_system("vcs")
<ABCDevice Oak 10.50.156.80>
.. seealso:: :meth:`~tng.device.abc_device.ABCDevice.name`
'''
for system in get_systems(engine):
if system.name == name:
return system
raise KeyError('No system with name %s found' % name)
def get_refeps(engine=get_engine()):
'''Returns all the :class:`~tng.device.abc_device.ABCDevice` objects for
which is_target() returns False.'''
return [
system for system in _get_systems(engine) if not system.is_target()
]
def _get_systems(engine=get_engine()):
return list(engine.device_factory.devices)
def decorator(cls):
get_engine().device_factory.interface(name, version, cls)
return cls