argparse-manpage fails to build with Python 3.9.0a2.


=================================== FAILURES ===================================
__________________________ TestAllExapmles.test_copr ___________________________

self = <test_examples.TestAllExapmles object at 0x7fe1757637c0>

    def test_copr(self):
        with pushd('examples/copr'):
            name = 'copr-cli.1'
            prefix = '/usr'
            try:
                os.remove(name)
            except OSError:
                pass
            idir = os.path.join(os.getcwd(), 'i')
            run_setup_py(['install', '--root', idir, '--prefix', prefix])
>           file_cmp('i/usr/share/man/man1/' + name, 'expected-output.1')

unittests/test_examples.py:67: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

file1 = 'i/usr/share/man/man1/copr-cli.1', file2 = 'expected-output.1'

    def file_cmp(file1, file2):
        with open(file1, 'r') as f1:
            with open(file2, 'r') as f2:
                a1 = f1.readlines()
                a2 = f2.readlines()
                assert len(a1) == len(a2)
                first = True
                for left, right in zip(a1, a2):
                    if first:
                        left  = re.sub('[0-9]{4}\\\\-[0-9]{2}\\\\-[0-9]{2}', '!!DATE!!', left)
                        right = re.sub('[0-9]{4}\\\\-[0-9]{2}\\\\-[0-9]{2}', '!!DATE!!', right)
                        first = False
>                   assert left == right
E                   AssertionError: assert 'usage: copr ...RSION ...]]\n' == 'usage: copr b...SION ...]]]\n'
E                     Skipping 44 identical leading characters in diff, use -v to show
E                     -  [VERSION ...]]
E                     +  [VERSION [VERSION ...]]]
E                     ?           +++++++++     +

unittests/test_examples.py:43: AssertionError
----------------------------- Captured stdout call -----------------------------
running install
running build
running build_py
running build_manpages
generating copr-cli.1
creating build
creating build/lib
creating build/lib/copr_cli
copying copr_cli/util.py -> build/lib/copr_cli
copying copr_cli/main.py -> build/lib/copr_cli
copying copr_cli/build_config.py -> build/lib/copr_cli
copying copr_cli/__init__.py -> build/lib/copr_cli
running install_lib
creating /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i
creating /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr
creating /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr/lib
creating /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr/lib/python3.9
creating /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr/lib/python3.9/site-packages
creating /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr/lib/python3.9/site-packages/copr_cli
copying build/lib/copr_cli/__init__.py -> /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr/lib/python3.9/site-packages/copr_cli
copying build/lib/copr_cli/build_config.py -> /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr/lib/python3.9/site-packages/copr_cli
copying build/lib/copr_cli/main.py -> /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr/lib/python3.9/site-packages/copr_cli
copying build/lib/copr_cli/util.py -> /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr/lib/python3.9/site-packages/copr_cli
byte-compiling /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr/lib/python3.9/site-packages/copr_cli/__init__.py to __init__.cpython-39.pyc
byte-compiling /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr/lib/python3.9/site-packages/copr_cli/build_config.py to build_config.cpython-39.pyc
byte-compiling /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr/lib/python3.9/site-packages/copr_cli/main.py to main.cpython-39.pyc
byte-compiling /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr/lib/python3.9/site-packages/copr_cli/util.py to util.cpython-39.pyc
running install_egg_info
running egg_info
creating example.egg-info
writing example.egg-info/PKG-INFO
writing dependency_links to example.egg-info/dependency_links.txt
writing top-level names to example.egg-info/top_level.txt
writing manifest file 'example.egg-info/SOURCES.txt'
reading manifest file 'example.egg-info/SOURCES.txt'
writing manifest file 'example.egg-info/SOURCES.txt'
Copying example.egg-info to /builddir/build/BUILD/argparse-manpage-1.3/examples/copr/i/usr/lib/python3.9/site-packages/example-0.1.0-py3.9.egg-info
running install_scripts
installing copr-cli.1
====================== 1 failed, 4 passed in 1.03 seconds ======================

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.9/fedora-rawhide-x86_64/01148329-argparse-manpage/

For all our attempts to build argparse-manpage with Python 3.9, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.9/package/argparse-manpage/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.9:
https://copr.fedorainfracloud.org/coprs/g/python/python3.9/

Let us know here if you have any questions.

Python 3.9 will be included in Fedora 33. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.9.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.