threading : make stop the caller

[Laurent Claessens]

    Hello


I've a list of tasks to perform. Each of them is a threading.Thread. 
Basically I have :

while task_list :
    task = task_list[0]
    task.run()
    task_list.remove(task)


Now I want, in some circumstance to raise errors that make the loop stop.

In order IOError to make stop the loop, I tried this :

no_error = True
while task_list and no_error:
    task = task_list[0]
    try :
       task.run()
    except IOError :
       no_error = False
    task_list.remove(task)

But it does not work (I think the exception is raised too late).

I prefer that the taske are not aware to be included in a loop, but I 
can make them raise personnal exceptions.
How can I do ?


Thanks
Laurent