dispatcher.py

try:
  from louie import dispatcher
  from louie import robustapply
  from louie import saferef
  louie=1
except ImportError:
  from pydispatch import dispatcher
  from pydispatch import robustapply
  from pydispatch import saferef
  saferef.safe_ref = saferef.safeRef
  robustapply.robust_apply = robustapply.robustApply
  louie=0

import sys

if not hasattr(robustapply, "_robust_apply"):
    # patch robustapply.robust_apply to display exceptions, but to ignore them
    # this makes 'dispatcher.send' to continue on exceptions, which is
    # the behaviour we want ; it's not because a receiver doesn't handle a
    # signal properly that the whole chain should stop
    robustapply._robust_apply = robustapply.robust_apply
    def __my_robust_apply(*args, **kwargs):
        try:
            return robustapply._robust_apply(*args, **kwargs)
        except:
            sys.excepthook(*sys.exc_info())
    if louie:
        robustapply.robust_apply = __my_robust_apply
    else:
        robustapply.robustApply = __my_robust_apply 
    del louie
    del __my_robust_apply