[isostatic]

Of the 50 /usr/bin/ python files on my Ubuntu 16.04 desktop, most are versioned in some way. None are called from "env".

     37 /usr/bin/python3
      4 /usr/bin/python3.5
      4 /usr/bin/python
      3 /usr/bin/python2.7
      2 /usr/bin/python2

The 4 that aren't versioned are

speedtest, speedtest-cli, dh_python2, apt-offline

So two from ubuntu/debian, and two from a package

[throwaway98434]

Right, someone working in ubuntu distro development has done this work for those packages specifically.

Above, we're discussing some build system where someone hasn't done this work. Most collections of python code in the world (I'm going to hazard a guess significantly upward of 90%) just use /usr/bin/python or /usr/bin/env python.

That's the nature of the problem.

[isostatic]

You're discussing RHEL7's /usr/bin.

  > For example, out of about 50 or so /usr/bin/python scripts I see in a RHEL7's /usr/bin

I posted Ubuntu 1604's in comparison.

[throwaway98434]

I'm discussing the problem of collections of python scripts using /usr/bin/python and I included the state of RHEL7 as an example.

The actual subject is CoolGuySteve's build system, which is likely to look like my example of RHEL7 rather than yours of ubuntu. The vast majority of environments look like RHEL7 or CoolGuySteve's build system where #!/usr/bin/python is the norm.