I tried to use $pip install vtk but I faced an error [enter image description here][1]
https://i.stack.imgur.com/piSTo.png
\"ERROR: Could not find a version
vtk 8.1.2 was released at Nov 29, 2018. The release provides a number of wheels but not for Python 3.8.
Use Python 3.7 (64-bit required). Or compile from sources.
To update this answer VTK now has Python 3.8 support under the 9.0 version has just been released VTK 9.0 download if you download and install the whl from the link provided.