Device with custom set

example.py

from ophyd.sim import Signal
from ophyd import Component, Device


class Filters(Device):
    a = Component(Signal, value=0)
    b = Component(Signal, value=1)

    def set(self, a, b):
        return (
            self.a.set(a) &
            self.b.set(b)
        )

    def set_attenuation(self, value):
        # math..
        return self.set(value, -value)

f = Filters(name="f")

In [7]: f
Out[7]: Filters(prefix='', name='f', read_attrs=['a', 'b'], configuration_attrs=[])

In [8]: f.read()
Out[8]: 
OrderedDict([('f_a', {'value': 0, 'timestamp': 1684439958.1712534}),
             ('f_b', {'value': 1, 'timestamp': 1684439958.1712852})])

In [9]: f.get()
Out[9]: FiltersTuple(a=0, b=1)

In [10]: f.set(a=5, b=10).wait()

In [11]: f.read()
Out[11]: 
OrderedDict([('f_a', {'value': 5, 'timestamp': 1684439994.8954685}),
             ('f_b', {'value': 10, 'timestamp': 1684439994.895793})])

In [12]: f.set_attenuation(7).wait()

In [13]: f.read()
Out[13]: 
OrderedDict([('f_a', {'value': 7, 'timestamp': 1684440007.746424}),
             ('f_b', {'value': -7, 'timestamp': 1684440007.7467787})])