Use "python" or "python3" in our examples (and scripts)?

[erikbosch]

Today we are a bit inconsistent. Sometimes we use python, sometimes python3. The practical difference is in most cases subtle as fewer and fewer of our target platforms support python2. On some platforms pythonnow points to python3. A similar discussion could be had for pip vs pip3.

So what do we prefer? If we agree we could try to align all documentation, and possibly also related scripts used in e.g. CI so we are consistent.

(We had a partial discussion in eclipse-kuksa/kuksa.val.feeders#105 but did not come to any conclusion)

Update 2023-07-21:

This also relates a bit to how we want to want to handle shebangs in Python files. There is a PEP at https://peps.python.org/pep-0394/ but it is not that prescriptive, basically listing advantages with both python and python3, and even if your system do not have any python2 installed there is no guarantee that python and python3 points to the same Python installation.