Fix/issue 275 transform ij index is a set

[BartSte]

Closing #275

See the test results here:

• test_results_issue_275.txt

Note that 1 test fails. This test also fails in the develop branch and is therefore unrelated to issue #275.

Thanks for sharing this repo!

[AlexanderFabisch]

Hi, thanks for preparing this PR. The test fails because you installed pydot, but you did not install graphviz. pydot calls dot from the graphviz package. The test will only be skipped when pydot is not available. I'm not sure how I should check for dot.

[BartSte]

Thanks for the tip. Now all tests pass:

============================================================================================================= test session starts ==============================================================================================================
platform linux -- Python 3.10.13, pytest-7.4.3, pluggy-1.3.0
rootdir: /home/barts/code/pytransform3d
configfile: setup.cfg
plugins: dash-2.14.1, cov-4.1.0
collected 348 items

pytransform3d/test/test_batch_rotations.py ........................................                                                                                                                                                      [ 11%]
pytransform3d/test/test_camera.py ........                                                                                                                                                                                               [ 13%]
pytransform3d/test/test_coordinates.py ..........                                                                                                                                                                                        [ 16%]
pytransform3d/test/test_geometry.py ..                                                                                                                                                                                                   [ 17%]
pytransform3d/test/test_mesh_loader.py ....                                                                                                                                                                                              [ 18%]
pytransform3d/test/test_plot_utils.py ..........................                                                                                                                                                                         [ 25%]
pytransform3d/test/test_rotations.py ...................................................................................................                                                                                                 [ 54%]
pytransform3d/test/test_trajectories.py .....................                                                                                                                                                                            [ 60%]
pytransform3d/test/test_transform_manager.py ......................                                                                                                                                                                      [ 66%]
pytransform3d/test/test_transformations.py ...................................................                                                                                                                                           [ 81%]
pytransform3d/test/test_uncertainty.py .......                                                                                                                                                                                           [ 83%]
pytransform3d/test/test_urdf.py ..........................................................                                                                                                                                               [100%]

---------- coverage: platform linux, python 3.10.13-final-0 ----------
Coverage HTML written to dir htmlcov

============================================================================================================= 348 passed in 9.08s ==============================================================================================================

[AlexanderFabisch]

I just released 3.5.0.