code: def run(self, **kwargs):
      
      env, kwargs = self._prepare_env(kwargs)
      logger.debug('Running command {}'.format(self.cmd))
      return subprocess.Popen(self.cmd, env=env, **kwargs)
docs: Runs this command.
  
      :param kwargs: Any extra keyword arguments to pass along to `subprocess.Popen`.
      :returns: A handle to the running command.
      :rtype: :class:`subprocess.Popen`