How to use the snakeviz.version.version function in snakeviz

def test_version():
    vcall = sp.Popen(
        ['snakeviz', '--version'], stdout=sp.PIPE, stderr=sp.PIPE)
    out, err = vcall.communicate()
    # in Python <= 3.3 this comes out on stderr, otherwise on stdout
    assert version.version in out.decode('utf-8') or \
        version.version in err.decode('utf-8')

def build_parser():
    parser = SVArgumentParser(
        description='Start SnakeViz to view a Python profile.')

    parser.add_argument('filename', help='Python profile to view')

    parser.add_argument('-v', '--version', action='version',
                        version=('%(prog)s ' + version.version))

    parser.add_argument('-H', '--hostname', metavar='ADDR', default='127.0.0.1',
                        help='hostname to bind to (default: %(default)s)')

    parser.add_argument('-p', '--port', type=int, metavar='PORT', default=8080,
                        help='port to bind to; if this port is already in use a '
                             'free port will be selected automatically '
                             '(default: %(default)s)')

    parser.add_argument('-b', '--browser', metavar='BROWSER_PATH',
                        help='name of webbrowser to launch as described in '
                             'the documentation of Python\'s webbrowser module: '
                             'https://docs.python.org/3/library/webbrowser.html')

    parser.add_argument('-s', '--server', action="store_true", default=False,
                        help='start SnakeViz in server-only mode--'