Possible bugs in demo trail.py? about vedo

[marcomusy]

Thanks Guillaume for spotting these problems,
the RenderPointsAsSpheresOn indeed is only present in later vtk versions, so i will add a version check to that specific line.
for the moment you can comment out that line.

your python doesn't seem to support f-strings, probably a macOS issue (?) .. i need to investigate that..
cheers, marco

[Gjacquenot]

• f-strings were introduced in Python 3.6
• RenderPointsAsSpheresOn is accessible from VTK 8.0

These two bugs can be fixed by updating setup.py:

• delete support for Python2.7 and Python3.5
• specify a version for VTK.

VTK is specified as a depency twice in the requirements.txt and in setup.py.
I would recommend to specify it once in requirements.txt and read the dependency from the setup.py

[marcomusy]

Yes- that makes sense, i will commit these changes along with others early next week, thanks.

[marcomusy]

Hi Guillaume
I added version.py so it's now picking it from a single source.
I would not drop python2 support for the moment as - i understand - it will be deprecated only by end of next year..
Cheers