https://bugzilla.redhat.com/show_bug.cgi?id=1611829



--- Comment #25 from Stefan Berger <[email protected]> ---
(In reply to Robert-André Mauchin from comment #24)
> (In reply to Stefan Berger from comment #21)
> > (In reply to Robert-André Mauchin from comment #18)
> > > > python3 doesn't seem to create the symlink of python to the python3 
> > > > executable. > So I have to use python2.
> > > > Actually, I need python as well. It seems to be the one setting the 
> > > > symlink. I 
> > > > suppose it will set a different symlink once python3 takes over?
> > > 
> > > Actually you must not use the "python" executable in your build script, it
> > > is a warning since F28, and an error on F30. You should fix whatever part 
> > > of
> > > your buildsystem that use "python" and make it use "python3".
> > > 
> > 
> > If I follow the logic in this python specification then python is the
> > generic executable for programs running with python2 or python3.
> > 
> > https://www.python.org/dev/peps/pep-0394/
> > 
> That's not the policy in Fedora:
> https://fedoraproject.org/wiki/Packaging:Python#Multiple_Python_Runtimes
> 
> Packages in Fedora MUST NOT use /usr/bin/python. Instead packages for Python
> 3 MUST use /usr/bin/python3 (even if upstream supports both Python 2 and 3).
> As a result of that /usr/bin/python (as well as /usr/bin/env python and
> similar) MUST NOT be used in shebang lines or as a dependency of a package.
> As of Fedora 30, all uses of unversioned python executables in shebang lines
> will fail the build. These shebangs MUST be fixed. If it is necessary to
> disable the checks, please see the information in
> Packaging:Guidelines#Shebang_lines. 

Changed to python3 and python3-twised.

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