@Isaiah Thank you for addressing the issue.
Here is what I did. To match with your Julia version I installed julia-0.4
installed PyCall.jl
changed the line you mentioned.
restart julia and rebuild PyCall.jl (just in case)
Following is the output of the @pyimport cv2 ( it is not much)
ERROR: BoundsError: attempt to access 0-element Array{UInt8,1}
at index [1]
in getindex at ./ascii.jl:13
in anonymous at /home/badami/.julia/v0.4/PyCall/src/PyCall.jl:313
in filter at array.jl:933
in pywrap at /home/badami/.julia/v0.4/PyCall/src/PyCall.jl:310
in pywrap at /home/badami/.julia/v0.4/PyCall/src/PyCall.jl:298
Any ideas?
Best
Ishrat
On Friday, September 18, 2015 at 6:14:51 PM UTC+2, Isaiah wrote:
>
> Hi Ishrat,
>
> Welcome to Julia. About the original question of loading OpenCV via
> PyCall, there was a discussion that mentioned using it, successfully, in
> this thread:
>
> https://github.com/timholy/Images.jl/issues/96#issuecomment-44529823
>
> I also just tested it myself, and cv2 imported successfully on Ubuntu
> 14.04 with Julia 0.3.11 / Python 2.7.6. However, I am using the default
> version of opencv installed by `apt-get install python-opencv`, which
> appears to be 2.4 (rather than your 3.0 version).
>
> A couple suggestions for debugging this:
>
> - the first thing is to check is that PyCall is up-to-date, using
> `Pkg.update()`. (just in case, might have been fixed since the last update).
>
> - another idea to add some debugging output in the failing "pywrap"
> function. You could change line 312 (
> https://github.com/stevengj/PyCall.jl/blob/804e065479362f0f3f8a413f8d9ddeb201fccfbc/src/PyCall.jl#L312)
>
> from:
>
> [symbol(x[1]) for x in filter(x -> x[1][1] != '_', members)]
> to
> [symbol(x[1]) for x in filter(x -> (println(x); x[1][1]) != '_', members)]
>
> And then start Julia try `@pyimport cv2` again. This should now print out
> all of the objects as they are filtered at that line, which might give a
> clue why the error is happening -- check the output just before the error
> occurs. Maybe there is some change in OpenCV 3 that is different from what
> PyCall expects there?
>
> Best,
> Isaiah
>
>
>
> On Fri, Sep 18, 2015 at 7:34 AM, Ishrat Badami <badami...@gmail.com
> <javascript:>> wrote:
>
>> Hi everyone,
>>
>> For quite some time I am trying to use opencv with julia.
>> Initially I tried installing Cxx.jl + OpenCV.jl with julia 4.0
>> following the instructions given here: https://github.com/Keno/Cxx.jl
>>
>> I encountered compiling errors while building Cxx package in julia .
>> https://github.com/Keno/Cxx.jl/issues/159 which still needs to be
>> resolved.
>> I also tried LLVM-3.7.0 + julia-0.4 but and I am encountering different
>> set of compilation errors related to clang library.
>>
>> Hence I gave up installing Cxx package.
>>
>> I then installed PyCall.jl package to try and see if I can use OpenCV
>> Python api in Julia.
>>
>> The python api works in python REPL using import cv2 command.
>>
>> But when I try
>>
>> *using PyCall + @pyimport cv2* I get following error:
>>
>> ERROR: BoundsError()
>> in anonymous at /home/badami/.julia/v0.3/PyCall/src/PyCall.jl:312
>> in filter at array.jl:1230
>> in pywrap at /home/badami/.julia/v0.3/PyCall/src/PyCall.jl:310
>> in pywrap at /home/badami/.julia/v0.3/PyCall/src/PyCall.jl:298
>>
>> My question is : Is it possible to pyimport opencv python api in julia at
>> all?
>> I am really looking forward for some help. Feeling desperate.
>>
>> My system specs:
>> OS: Ubuntu 14.04
>> Python: 2.7.6
>> OpenCV: 3.0.0
>> julia-0.3
>>
>> Thank you.
>>
>>
>>
>
