The following script shows how an input register senses the state of an output register.
#!/usr/bin/python
from PyTango import *
import sys
import time
try :
ireg1 = DeviceProxy( "hires/exp/ireg1")
oreg1 = DeviceProxy( "hires/exp/oreg1")
attr=ireg1.read_attribute( "Value")
print "ireg1, value ", attr.value
attr.value = 1
oreg1.write_attribute( attr)
attr=ireg1.read_attribute( "Value")
print "ireg1, value ", attr.value
attr.value = 0
oreg1.write_attribute( attr)
except :
print "Failed with exception !"
print sys.exc_info()[0]