object detection multiprocessing graph load fail

[apiszcz]

The single image test works.
This appears to be a video capture issue.

The object detection is producing a graph.LoadTensor error

[INFO/ForkPoolWorker-1] process shutting down
[DEBUG/ForkPoolWorker-1] running all "atexit" finalizers with priority >= 0
[DEBUG/ForkPoolWorker-1] running the remaining "atexit" finalizers
Process ForkPoolWorker-1:
Traceback (most recent call last):
  File "/usr/lib/python3.5/multiprocessing/process.py", line 249, in _bootstrap
    self.run()
  File "/usr/lib/python3.5/multiprocessing/process.py", line 93, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib/python3.5/multiprocessing/pool.py", line 103, in worker
    initializer(*initargs)
  File "py_examples/object_detection_app.py", line 113, in worker
    graph.LoadTensor(resize(frame/255.0,dim,1)[:,:,(2,1,0)].astype(np.float16), 'user object')
TypeError: unsupported operand type(s) for /: 'NoneType' and 'float'
[INFO/ForkPoolWorker-1] process exiting with exitcode 1
[DEBUG/MainProcess] cleaning up worker 0
[Level 5/MainProcess] finalizer calling <built-in function close> with args (18,) and kwargs {}
[DEBUG/MainProcess] added worker
[DEBUG/ForkPoolWorker-3] Queue._after_fork()
[DEBUG/ForkPoolWorker-3] Queue._after_fork()
[INFO/ForkPoolWorker-3] child process calling self.run()

[gudovskiy]

@apiszcz look at #1

[apiszcz]

Solution for this issue was to uninstall opencv-python with pip3
Working!
Thank you for all the work on YoloNCS

https://stackoverflow.com/questions/42325764/python-opencv-videocapture-differences-between-python-2-7-to-python-3-5

1down voteaccepted	I had exactly the same problem. OpenCV was installed from the sources. The difference between Python 2 and 3 environment was, that for Python 3 opencv-python was additionally installed via pip3. Apip3 uninstall opencv-pythonsolved it in my case.

[gudovskiy]

@apiszcz thank you.

[zsy372901]

Finally, I solved this problem by the following two step:

1. Following this web mentioned OPTION 2, install OPENCV by source code.
2. Replaced the compiled .so dynamic library with the one that comes with opencv-python python3 package:
   sudo cp <path to opencv source repo>/build/lib/python3/cv2.cpython-35m-x86_64-linux-gnu.so /usr/local/lib/python3.5/dist-packages/cv2/cv2.cpython-35m-x86_64-linux-gnu.so
   Hope it can help you.

[mashrin]

Hey, I followed the link to install opencv from source. While executing sample examples, it is working well for C++ and Java example but it shows "No module named cv2" for the Python example. Can anyone please help me with this.

Thanks!

[apiszcz]

the opencv installation does not appear to be in your path for PYTHON. PYTHONLIB is one way to add it.

…

On Thu, Dec 28, 2017 at 1:51 AM, Mashrin Srivastava < ***@***.***> wrote: Hey, I followed the link to install opencv from source. While executing sample examples, it is working well for C++ and Java example but it shows "No module named cv2" for the Python example. Can anyone please help me with this. Thanks! — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#4 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABXVTWaHq3zRwi56ReXY2sPKexso5AZMks5tEzqMgaJpZM4QJ5Md> .

[mashrin]

@apiszcz thanks a lot for your reply.
I copied the cv2.so and cv2.py file from /usr/local/lib/python2.7/dist-packages to /usr/local/lib/python2.7/site-packages and added-
export PYTHONPATH=$PYTHONPATH:/usr/local/lib/python2.7/site-packages to ~/.bashrc and now it is getting imported in python2.

But I am still not being able to run it for python3 and when I repeated the same step to add the cv2.so and cv2.py to the python3.6/site-packages and again adding a PYTHON path for it similarly, in bashrc.
But now, on importing cv2 in python3, I am getting a Segmentation fault error.
Let me know if you have any suggestions regarding this.

Thanks!

[mashrin]

After a reboot, I am getting this error while importing cv2 using python3

Traceback (most recent call last):
File "", line 1, in
File "/usr/local/lib/python2.7/site-packages/cv2/init.py", line 7, in
from . import cv2
ImportError: /usr/local/lib/python2.7/site-packages/cv2/cv2.so: undefined symbol: PyCObject_Type

[apiszcz]

Those error messages that you are using Python 2.7 you need to install python 3.5

…

On Dec 28, 2017 11:25 AM, "Mashrin Srivastava" ***@***.***> wrote: After a reboot, I am getting this error while importing cv2 using python3 Traceback (most recent call last): File "", line 1, in File "/usr/local/lib/python2.7/site-packages/cv2/*init*.py", line 7, in from . import cv2 ImportError: /usr/local/lib/python2.7/site-packages/cv2/cv2.so: undefined symbol: PyCObject_Type — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#4 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABXVTbJ0Qb1h-xNG0zj-rKm7WXPuoz3Dks5tE8D6gaJpZM4QJ5Md> .

[mashrin]

I already have python 3.5 as well as python 3.6 installed.

[apiszcz]

Search path is incorrect File "/usr/local/lib/python2.7/site-packages/cv2/*init*.py", line 7, in On Thu, Dec 28, 2017 at 1:39 PM, Mashrin Srivastava < notifications@github.com> wrote:

…

I already have python 3.5 as well as python 3.6 installed. ‌ On Thu, Dec 28, 2017 at 10:03 PM, apiszcz ***@***.***> wrote: > Those error messages that you are using Python 2.7 you need to install > python 3.5 > > On Dec 28, 2017 11:25 AM, "Mashrin Srivastava" ***@***.*** > > wrote: > > > After a reboot, I am getting this error while importing cv2 using python3 > > > > Traceback (most recent call last): > > File "", line 1, in > > File "/usr/local/lib/python2.7/site-packages/cv2/*init*.py", line 7, in > > from . import cv2 > > ImportError: /usr/local/lib/python2.7/site-packages/cv2/cv2.so: > undefined > > symbol: PyCObject_Type > > > > — > > You are receiving this because you were mentioned. > > Reply to this email directly, view it on GitHub > > <#4 (comment) >, > > or mute the thread > > <https://github.com/notifications/unsubscribe- auth/ABXVTbJ0Qb1h-xNG0zj- > rKm7WXPuoz3Dks5tE8D6gaJpZM4QJ5Md> > > > . > > > > — > You are receiving this because you commented. > Reply to this email directly, view it on GitHub > <#4 (comment)>, > or mute the thread > <https://github.com/notifications/unsubscribe-auth/AQFh3t4vCQovvfkPyJz- aifz7PZTyYc2ks5tE8LtgaJpZM4QJ5Md> > . > — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#4 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABXVTWRjsgKrZWLKBU8cOn45LEn26caHks5tE-BIgaJpZM4QJ5Md> .

[mashrin]

I have already made the changes in bashrc. I just copied the cv2.so and cv2.py from python 2.7 to python 3.5 and python 3.6 And then added those path to the bashrc as well. Now, when I try to run it, I am just getting segmentation fault (Nothing else except this)

…

On 29-Dec-2017 12:11 AM, "apiszcz" ***@***.***> wrote: Search path is incorrect File "/usr/local/lib/python2.7/site-packages/cv2/*init*.py", line 7, in On Thu, Dec 28, 2017 at 1:39 PM, Mashrin Srivastava < ***@***.***> wrote: > I already have python 3.5 as well as python 3.6 installed. > > > > ‌ > > On Thu, Dec 28, 2017 at 10:03 PM, apiszcz ***@***.***> > wrote: > > > Those error messages that you are using Python 2.7 you need to install > > python 3.5 > > > > On Dec 28, 2017 11:25 AM, "Mashrin Srivastava" < ***@***.*** > > > > wrote: > > > > > After a reboot, I am getting this error while importing cv2 using > python3 > > > > > > Traceback (most recent call last): > > > File "", line 1, in > > > File "/usr/local/lib/python2.7/site-packages/cv2/*init*.py", line 7, > in > > > from . import cv2 > > > ImportError: /usr/local/lib/python2.7/site-packages/cv2/cv2.so: > > undefined > > > symbol: PyCObject_Type > > > > > > — > > > You are receiving this because you were mentioned. > > > Reply to this email directly, view it on GitHub > > > <#4 (comment)- 354314919 > >, > > > or mute the thread > > > <https://github.com/notifications/unsubscribe- > auth/ABXVTbJ0Qb1h-xNG0zj- > > rKm7WXPuoz3Dks5tE8D6gaJpZM4QJ5Md> > > > > > . > > > > > > > — > > You are receiving this because you commented. > > Reply to this email directly, view it on GitHub > > <#4 (comment) >, > > or mute the thread > > <https://github.com/notifications/unsubscribe- auth/AQFh3t4vCQovvfkPyJz- > aifz7PZTyYc2ks5tE8LtgaJpZM4QJ5Md> > > . > > > > — > You are receiving this because you were mentioned. > Reply to this email directly, view it on GitHub > <#4 (comment)>, > or mute the thread > <https://github.com/notifications/unsubscribe-auth/ ABXVTWRjsgKrZWLKBU8cOn45LEn26caHks5tE-BIgaJpZM4QJ5Md> > . > — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#4 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AQFh3isy02gP6WMJFMy6pvkQK16b-DU3ks5tE-DugaJpZM4QJ5Md> .