Error in plot3d.py example

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
python
Domain
computer-graphics

Research direction

Reproduce the failure by running examples/graphics/plot3.py, then inspect arrayfire/graphics.py around line 296 where plot3 calls numdims() on line. Confirm the example completes without the reported NoneType AttributeError and that the 3D plot is launched successfully.

Written by the indexing model from the issue text.

Description

Hi,
I recently installed arrayfire python bindings. It passes all the tests and it launches few of the examples. However I got the following error when I tried to launch plot3d.py in the examples/graphics folder. Any idea ?

ArrayFire v3.6.2 (CUDA, 64-bit Linux, build dc38ef1)
Platform: CUDA Toolkit 10, Driver: 418.39
[0] Quadro M2000M, 4044 MB, CUDA Compute 5.0
Traceback (most recent call last):
  File "examples/graphics/plot3.py", line 32, in <module>
    win.plot3(Pts)
  File "/home/user1/miniconda3/envs/ptmviewer/lib/python3.7/site-packages/arrayfire-3.6.20181017-py3.7.egg/arrayfire/graphics.py", line 296, in plot3
    assert(line.numdims() == 3)
AttributeError: 'NoneType' object has no attribute 'numdims'
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Python
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