doc/historic/2003/pycon/deferex/deferex-complex-failure.py

   1 from deferexex import adder
   2
   3 class MyExc(Exception):
   4     "A sample exception"
   5
   6 class MyObj:
   7
   8     def blowUp(self, result):
   9         self.x = result
  10         raise MyExc("I can't go on!")
  11
  12     def trapIt(self, failure):
  13         failure.trap(MyExc)
  14         print 'error (', failure.getErrorMessage(), '). x was:', self.x
  15         return self.x
  16
  17     def onSuccess(self, result):
  18         print result + 3
  19
  20     def whenTrapped(eslf, result):
  21         print 'Finally, result was', result
  22
  23     def run(self, o):
  24         o.callRemote("add", 1, 2).addCallback(
  25             self.blowUp).addCallback(
  26             self.onSuccess).addErrback(
  27             self.trapIt).addCallback(
  28             self.whenTrapped)
  29
  30 MyObj().run(adder)