[GRASS-dev] [GRASS GIS] #3799: Python 3 Error using MultiModule and ParallelModuleQueue

[GRASS GIS]

#3799: Python 3 Error using MultiModule and ParallelModuleQueue
--------------------------+----------------------------------
  Reporter:  AnikaBettge  |      Owner:  grass-dev@…
      Type:  defect       |     Status:  new
  Priority:  normal       |  Milestone:  7.8.3
 Component:  Python       |    Version:  git-releasebranch78
Resolution:               |   Keywords:  python3, multimodule
       CPU:  Unspecified  |   Platform:  Linux
--------------------------+----------------------------------
Changes (by neteler):

 * keywords:  python3 => python3, multimodule
 * version:  svn-trunk => git-releasebranch78
 * component:  Default => Python
 * milestone:  7.6.2 => 7.8.3


Comment:

 Still broken... (test script attached):

 {{{
 GRASS 7.8.2dev (nc_spm_08):~ > python3 test_multimodule.py
 projection: 99 (Lambert Conformal Conic)
 zone:       0
 datum:      nad83
 ellipsoid:  a=6378137 es=0.006694380022900787
 north:      228500
 south:      215000
 west:       630000
 east:       645000
 nsres:      10
 ewres:      10
 rows:       1350
 cols:       1500
 cells:      2025000
 projection: 99 (Lambert Conformal Conic)
 zone:       0
 datum:      nad83
 ellipsoid:  a=6378137 es=0.006694380022900787
 north:      228500
 south:      215000
 west:       630000
 east:       645000
 nsres:      10
 ewres:      10
 rows:       1350
 cols:       1500
 cells:      2025000
 projection: 99 (Lambert Conformal Conic)
 zone:       0
 datum:      nad83
 ellipsoid:  a=6378137 es=0.006694380022900787
 north:      228500
 south:      215000
 west:       630000
 east:       645000
 nsres:      10
 ewres:      10
 rows:       1350
 cols:       1500
 cells:      2025000
  100%
 Traceback (most recent call last):
   File "/usr/lib64/python3.7/multiprocessing/queues.py", line 236, in
 _feed
     obj = _ForkingPickler.dumps(obj)
   File "/usr/lib64/python3.7/multiprocessing/reduction.py", line 51, in
 dumps
     cls(buf, protocol).dump(obj)
 TypeError: can't pickle _thread.lock objects
  100%
  100%
 Traceback (most recent call last):
   File "/usr/lib64/python3.7/multiprocessing/queues.py", line 236, in
 _feed
     obj = _ForkingPickler.dumps(obj)
   File "/usr/lib64/python3.7/multiprocessing/reduction.py", line 51, in
 dumps
     cls(buf, protocol).dump(obj)
 TypeError: can't pickle _thread.lock objects
 Traceback (most recent call last):
   File "/usr/lib64/python3.7/multiprocessing/queues.py", line 236, in
 _feed
     obj = _ForkingPickler.dumps(obj)
   File "/usr/lib64/python3.7/multiprocessing/reduction.py", line 51, in
 dumps
     cls(buf, protocol).dump(obj)
 TypeError: can't pickle _thread.lock objects
 }}}

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/3799#comment:3>
GRASS GIS <https://grass.osgeo.org>