[GRASS-dev] pygrass: How to allow Ctrl-C to stop all subprocesses of GridModule

[Moritz Lennert]

And another question on GridModule:

For the same module using GridModule to split the task of edge detection 
in a raster map into many parallel tasks, when I want to stop the module 
run using Ctrl-C I get tons of

Process PoolWorker-315:
Traceback (most recent call last):
Traceback (most recent call last):
   File "/usr/lib/python2.7/multiprocessing/process.py", line 267, in 
_bootstrap
   File "/usr/lib/python2.7/multiprocessing/process.py", line 267, in 
_bootstrap
     self.run()
     self.run()
   File "/usr/lib/python2.7/multiprocessing/process.py", line 114, in run
   File "/usr/lib/python2.7/multiprocessing/process.py", line 114, in run
     self._target(*self._args, **self._kwargs)
     self._target(*self._args, **self._kwargs)
   File "/usr/lib/python2.7/multiprocessing/pool.py", line 102, in worker
   File "/usr/lib/python2.7/multiprocessing/pool.py", line 102, in worker
     task = get()
   File "/usr/lib/python2.7/multiprocessing/queues.py", line 374, in get
     task = get()
   File "/usr/lib/python2.7/multiprocessing/queues.py", line 374, in get
     racquire()
     racquire()
KeyboardInterrupt


and cannot stop the module, even when flooding the input with Ctrl-Cs.

Any hint how to allow Ctrl-C to stop all subprocesses ?

Moritz