FooBar DS (A DS to test taurus issue https://github.com/taurus-org/taurus/issues/1060

FooBar.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""Basic DS for testing events"""

import numpy
from tango import DevState
from tango.server import Device, attribute


class FooBar(Device):
    
    foo = attribute(label="Foo", dtype=int, abs_change=0.1)
    bar = attribute(label="Bar", dtype=int,
                    #polling_period=1,
                    #abs_change=0.1,
                    #rel_change=0.1
                    )

    def init_device(self):
        Device.init_device(self)
        self.set_state(DevState.RUNNING)
        self.poll_attribute('foo', 100)
        print("Polled attributes:", self.get_polled_attr())

    def read_foo(self):
        print("f", end='', flush=True)
        return numpy.random.randint(1, 5)
    
    def read_bar(self):
        print("b", end='', flush=True)
        return numpy.random.randint(100, 999)
        


if __name__ == "__main__":
    # register in the DB  (becareful when running in production servers!)
    import tango
    dev_info = tango.DbDevInfo()
    dev_info.server = "FooBar/test"
    dev_info._class = "FooBar"
    dev_info.name = "test/foobar/1"
    db = tango.Database()
    db.add_device(dev_info)

    # run
    FooBar.run_server()