[MacPorts] #53562: Probem Installing Opencv 3.2.0 with Python 3.5

[MacPorts]

#53562: Probem Installing Opencv 3.2.0 with Python 3.5
----------------------------+----------------------------
 Reporter:  fmw42           |      Owner:
     Type:  defect          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  ports           |    Version:  2.4.0
 Keywords:  python, opencv  |       Port:  python, opencv
----------------------------+----------------------------
 I recently installed some python support tools (py35-pip), which caused
 MacPorts to upgrade other ports including, I believe, python35 and opencv.

 Recently I tried to run one of my script and got an error message.

 {{{
 python3.5 match_image_subsections.py
 /Users/fred/Desktop/ALIVE_sub_compare_test2
 Traceback (most recent call last):
   File "match_image_subsections.py", line 31, in <module>
     import cv2
 ImportError:
 dlopen(/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5
 /site-packages/cv2.cpython-35m-darwin.so, 2): Library not loaded:
 /opt/local/lib/libwebp.6.dylib
   Referenced from: /opt/local/lib/libopencv_imgcodecs.3.1.dylib
   Reason: image not found
 }}}



 So I just tried to launch python and import cv2, which failed as below:

 {{{
 python3.5
 Python 3.5.3 (default, Feb 10 2017, 16:04:07)
 [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
 Type "help", "copyright", "credits" or "license" for more information.
 >>> import cv2
 Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
 ImportError:
 dlopen(/opt/local/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5
 /site-packages/cv2.cpython-35m-darwin.so, 2): Library not loaded:
 /opt/local/lib/libwebp.6.dylib
   Referenced from: /opt/local/lib/libopencv_imgcodecs.3.1.dylib
   Reason: image not found
 >>> quit()
 }}}

 So I tried cleaning python35 and opencv and install again, but I am now
 getting the following message:

 {{{
 --->  Building opencv
 Error: Failed to build opencv: command execution failed
 Error: See
 /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_graphics_opencv/opencv/main.log
 for details.
 Error: rev-upgrade failed: Error rebuilding opencv
 Error: Follow https://guide.macports.org/#project.tickets to report a bug.
 }}}

 This appears to be a bug. But perhaps I am doing something wrong.

 Please confirm if a bug and have it fixed. Or if I am doing something
 wrong, I would appreciate any help if getting this working. I am no longer
 able to run my python/opencv scripts.

 See attachments for my MacPorts session and the installation attempts and
 bug reports.

 I may have made a mistake trying to use version numbers, but at the end of
 my session, I tried without the version numbers after cleaning python and
 opencv, but still no success.

 Thanks

--
Ticket URL: <https://trac.macports.org/ticket/53562>
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