** Changed in: opencv (Ubuntu)
Status: Confirmed => Fix Committed
** Changed in: opencv (Ubuntu)
Assignee: (unassigned) => Mattia Rizzolo (mapreri)
** Changed in: opencv (Ubuntu)
Importance: Undecided => Wishlist
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https://bugs.launchpad.net/bugs/1556156
Title:
OpenCV lacks Python 3 bindings
Status in opencv package in Ubuntu:
Fix Committed
Status in opencv package in Debian:
Fix Released
Bug description:
Because the packaged OpenCV remains at the obsolete 2.4 release even
still in 16.04 (Xenial Xerus), which is already in feature freeze, it
is looking as though 2018 is the earliest that an Ubuntu LTS release
will package OpenCV 3.x, which at that point will be already some 4
years old. (And the currently-shipped OpenCV 2.x branch will be going
on 9 years.) See bugs #1516985 and #1540168.
This is not a great state of affairs for such an important package,
but what exacerbates the situation is that OpenCV in Ubuntu (and in
Debian) currently altogether lacks Python 3 support. Namely, the
current OpenCV 2.4 packages support only Python 2.7, since Python 3
support was introduced only in OpenCV 3.0 [1], which was only packaged
in Debian (experimental) last December.
This has already been a pain point for OpenCV users (and some packages
requiring OpenCV) and is likely to become a burning problem over the
course of this LTS release's lifecycle. The robotics community (e.g.
ROS users), in particular, rely on Ubuntu LTS as a platform, and are
going to be rather rudely surprised both by Xenial's old OpenCV
release and still more by its lack of Python 3 support.
The relevant upstream Debian bugs are 799262 [2] and 792677 [3]. As
mentioned, OpenCV 3.0 has already been packaged in Debian (packages
libopencv-*3.0) and could be imported to Ubuntu. The Python bindings
(python-opencv) still remain with a Python 2.7 requirement, however,
which needs work upstream.
What can be done here? Would there be any prospect at all for a
feature freeze exception so as to ship OpenCV 3 for Xenial? Once the
base libraries are available, the Python 3 packaging is a much lesser
problem and could even be done via PyPI.
[1] http://opencv.org/opencv-3-0-alpha.html
[2] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=799262
[3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=792677
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