camonitor callback

camonitor_example.py

from pkg_resources import require
require('cothread')
import cothread
from cothread import Timedout
from cothread.catools import caput, camonitor

done = cothread.Event()

def callback(value):
    if value == "whatever value I'm looking for":
        done.Signal()
 
monitor = camonitor("foo", callback, datatype=DBR_STRING)
caput("foo", "whatever value I'm looking for")
try:
    done.Wait(timeout=42)
    print("success")
except Timedout:
    print("failed")
monitor.close()