How to use the flower.command.FlowerCommand function in flower

def test_conf_abs(self):
        with tempfile.NamedTemporaryFile() as cf:
            with self.mock_option('conf', cf.name), self.mock_option('debug', False):
                cf.write('debug=True\n'.encode('utf-8'))
                cf.flush()
                command = FlowerCommand()
                command.apply_options('flower', argv=['--conf=%s' % cf.name])
                self.assertEqual(cf.name, options.conf)
                self.assertTrue(options.debug)

def test_empty_conf(self):
        with self.mock_option('conf', None):
            command = FlowerCommand()
            command.apply_options('flower', argv=['--conf=/dev/null'])
            self.assertEqual('/dev/null', options.conf)

def test_port(self):
        with self.mock_option('port', 5555):
            command = FlowerCommand()
            command.apply_options('flower', argv=['--port=123'])
            self.assertEqual(123, options.port)

def test_conf_relative(self):
        with tempfile.NamedTemporaryFile(dir='.') as cf:
            with self.mock_option('conf', cf.name), self.mock_option('debug', False):
                cf.write('debug=True\n'.encode('utf-8'))
                cf.flush()
                command = FlowerCommand()
                command.apply_options('flower', argv=['--conf=%s' % os.path.basename(cf.name)])
                self.assertTrue(options.debug)

def test_default_option(self):
        command = FlowerCommand()
        command.apply_options('flower', argv=[])
        self.assertEqual('flowerconfig.py', options.conf)

def test_address(self):
        with self.mock_option('address', '127.0.0.1'):
            command = FlowerCommand()
            command.apply_options('flower', argv=['--address=foo'])
            self.assertEqual('foo', options.address)

def main():
    try:
        flower = FlowerCommand()
        flower.execute_from_commandline()
    except Exception:
        import sys
        print(bugreport(app=flower.app), file=sys.stderr)
        raise

def early_version(self, argv):
        if '--version' in argv:
            print(__version__, file=self.stdout)
            super(FlowerCommand, self).early_version(argv)

def flower():
    """Start flower"""
    assert pkconfig.channel_in('dev')
    run_dir = _run_dir().join('flower').ensure(dir=True)
    with pkio.save_chdir(run_dir):
        command.FlowerCommand().execute_from_commandline([
            'flower',
            '--address=' + cfg.ip,
            '--app=sirepo.celery_tasks',
            '--no-color',
            '--persistent',
        ])