> Hashbangs should refer to a version: e.g. "#!/usr/bin/env python2". Github shows approx. 3M results for "/usr/bin/env python", but less than 200k combined for

> Hashbangs should refer to a version: e.g. "#!/usr/bin/env python2". Github shows approx. 3M results for "/usr/bin/env python", but less than 200k combined for version-specific hashbangs. For loose scripts this is the way, "env python" is simply wrong. Always use "..env python2" or "..env python3"; it works everywhere, and where the correct version is not installed it gives a relatively helpful error message (something like "No such file or directory: "python2" ").