convert fedora python spec file to epel python spec file

pyfed2epel.py

#!/usr/bin/env python3
import sys
print('''%if 0%{?python3_pkgversion}
%global python3_pkgversion 34
%endif
''')
with open(sys.argv[1]) as f:
    skip_until_startswith = None
    for line in f:
        if line == '%py2_install\n' or line == '%py2_build\n' or 'py.test-%{python2_version}' in line or '%{__python2}' in line:
            continue
        if skip_until_startswith:
            if line.startswith(skip_until_startswith):
                skip_until_startswith = None
            else:
                continue

        if line.startswith('Name: '):
            line = line.replace('python', 'python3')
        if line.startswith('%package -n     python2-'):
            skip_until_startswith = "%package -n     python3-"
            continue
        if line.startswith('%files -n python2-%{pypi_name}'):
            skip_until_startswith = '%files -n python3-%{pypi_name}'
            continue
        if line.startswith('%package') or \
                line.startswith('Requires') or \
                line.startswith('BuildRequires') or \
                line.startswith('%description') or \
                line.startswith('%files') or \
                line.startswith('%{?python_provide'):
            line = line.replace(' python3', ' python%{python3_pkgversion}')
        line = line.replace('C.UTF-8', 'en_US.utf8')
        print (line, end="")