How to use the rss2email.__version__ function in rss2email

def user_agent(self):
        return self._user_agent.\
            replace('__VERSION__', __version__).\
            replace('__URL__', __url__)

import codecs as _codecs
import os.path as _os_path
import setuptools

from rss2email import __version__, __url__, __author__, __email__


_this_dir = _os_path.dirname(__file__)

setuptools.setup(
    name='rss2email',
    version=__version__,
    maintainer=__author__,
    maintainer_email=__email__,
    url=__url__,
    download_url='{}/archive/v{}.tar.gz'.format(__url__, __version__),
    license='GNU General Public License (GPL)',
    platforms=['all'],
    description=__doc__,
    long_description=_codecs.open(
        _os_path.join(_this_dir, 'README.rst'), 'r', encoding='utf-8').read(),
    classifiers=[
        'Development Status :: 2 - Pre-Alpha',
        'Environment :: Console',
        'Intended Audience :: End Users/Desktop',
        'Operating System :: OS Independent',
        'License :: OSI Approved :: GNU General Public License (GPL)',
        'License :: OSI Approved :: GNU General Public License v2 (GPLv2)',
        'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
        'Programming Language :: Python',
        'Programming Language :: Python :: 3',
        'Programming Language :: Python :: 3.4',

def get_rss2email_version(package):
    return __version__

# rss2email.  If not, see .

"A python script that converts RSS/Atom newsfeeds to email"

import codecs as _codecs
import os.path as _os_path
import setuptools

from rss2email import __version__, __url__, __author__, __email__


_this_dir = _os_path.dirname(__file__)

setuptools.setup(
    name='rss2email',
    version=__version__,
    maintainer=__author__,
    maintainer_email=__email__,
    url=__url__,
    download_url='{}/archive/v{}.tar.gz'.format(__url__, __version__),
    license='GNU General Public License (GPL)',
    platforms=['all'],
    description=__doc__,
    long_description=_codecs.open(
        _os_path.join(_this_dir, 'README.rst'), 'r', encoding='utf-8').read(),
    classifiers=[
        'Development Status :: 2 - Pre-Alpha',
        'Environment :: Console',
        'Intended Audience :: End Users/Desktop',
        'Operating System :: OS Independent',
        'License :: OSI Approved :: GNU General Public License (GPL)',
        'License :: OSI Approved :: GNU General Public License v2 (GPLv2)',

def run(*args, **kwargs):
    """The rss2email command line interface

    Arguments passed to this function are forwarded to the parser's
    `.parse_args()` call without modification.
    """
    parser = _argparse.ArgumentParser(
        prog='rss2email', description=_PACKAGE_DOCSTRING)

    parser.add_argument(
        '-v', '--version', action='version',
        version='%(prog)s {}'.format(__version__))
    parser.add_argument(
        '--full-version', action=FullVersionAction, nargs=0,
        help='print the version information of all related packages and exit')
    parser.add_argument(
        '-c', '--config', metavar='PATH', default=[], action='append',
        help='path to the configuration file')
    parser.add_argument(
        '-d', '--data', metavar='PATH',
        help='path to the feed data file')
    parser.add_argument(
        '-V', '--verbose', default=0, action='count',
        help='increment verbosity')
    subparsers = parser.add_subparsers(title='commands')

    new_parser = subparsers.add_parser(
        'new', help=_command.new.__doc__.splitlines()[0])

super(ProcessingError, self).log()
        if type(self) == ProcessingError:  # not a more specific subclass
            _LOG.warning(
                '=== rss2email encountered a problem with this feed ===')
            _LOG.warning(
                '=== See the rss2email FAQ at {} for assistance ==='.format(
                    __url__))
            _LOG.warning(
                '=== If this occurs repeatedly, send this to {} ==='.format(
                    __email__))
            _LOG.warning(
                'error: {} {}'.format(
                    self.parsed.get('bozo_exception', "can't process"),
                    self.feed.url))
            _LOG.warning(_pprint.pformat(self.parsed))
            _LOG.warning('rss2email {}'.format(__version__))
            _LOG.warning('feedparser {}'.format(_feedparser.__version__))
            _LOG.warning('html2text {}'.format(_html2text.__version__))
            _LOG.warning('Python {}'.format(_sys.version))
            _LOG.warning('=== END HERE ===')