In the package texlive-latex-papersize-7:20180414-35.fc30.noarch (installed via dnf install texlive-latex-papersize on Fedora Core 30), /usr/bin/latex-papersize is a Python 2 script incorrectly set to run under the Python 3 interpreter.  It contains "print" statements in Python 2 syntax, among other things.  Thus:

    [silasbrown@localhost ~]$ latex-papersize 
      File "/usr/bin/latex-papersize", line 156
        print __doc__.strip() ; raise SystemExit
                    ^
    SyntaxError: invalid syntax

There does now exist an upstream version which is compatible with Python 3, so the fix would be to simply get the upstream version from CTAN, or indeed from my personal website at http://ssb22.user.srcf.net/notes/latex-papersize.py

Since this is similar to what happened in bug 1748462 with the git-tools package, I can't help wondering if some good chap at Red Hat thought it was an idea to simply mark all Python 2 scripts as Python 3, across all packages, without actually converting any of them (not even with the automated 2to3 tool), without testing anything (not even checking that the script still prints its help text), and without sending any courtesy emails upstream to find out if upstream developers might be able to provide real Python 3 versions.  Are we just counting on affected users figuring out how to report bugs that random scripts have stopped working all over the distro?