cv2.waitKey(1) function not implemented

[riple]

I ran Microsoft-ELL tutorial on Pi 0 W, and it seems the opencv package is not compiled properly.
My version of opencv is
opencv: 3.3.0-py36hcfffc66_0
It is installed by this command
conda install -c microsoft-ell/label/pi_zero opencv
And the packages installed are
Package plan for installation in environment /home/pi/berryconda3/envs/py36:
The following NEW packages will be INSTALLED:

bzip2:       1.0.6-1               lisaong
ffmpeg:      3.2.4-hf767ee3_0
giflib:      5.1.4-h3b1de47_0
hdf5:        1.8.17-0
jasper:      1.900.1-4             microsoft-ell
jpeg:        9b-0                  microsoft-ell
libgfortran: 3.0.0-1
libpng:      1.6.29-0              microsoft-ell
libtiff:     4.0.6-0
libwebp:     0.5.2-hcb3eeb6_7
numpy:       1.14.0-py36hebd9de5_0
openblas:    0.2.19-0
opencv:      3.3.0-py36hcfffc66_0
x264:        20131217-hc5d671e_0

Here are the errors.

OpenCV Error: Unspecified error (The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script) in cvWaitKey, file /home/jhelmus/conda/conda-bld/opencv_1512232341522/work/modules/highgui/src/window.cpp, line 676
Traceback (most recent call last):
File "tutorial.py", line 89, in
main()
File "tutorial.py", line 49, in main
while (cv2.waitKey(1) & 0xFF) == 0xFF:
cv2.error: /home/jhelmus/conda/conda-bld/opencv_1512232341522/work/modules/highgui/src/window.cpp:676: error: (-2) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Carbon support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function cvWaitKey

[jjhelmus]

Closing as a duplicate of #21. The OpenCV package in the rpi channel is not build with GUI support, a pull requests adding this support would be welcome.