<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def silent_parse_args(self, command, args):
 """ Silently attempt to parse args. If there is a failure then we ignore the effects. Using an in-place namespace object ensures we capture as many of the valid arguments as possible when the argparse system would otherwise throw away the results. """

        args_ns = argparse.Namespace()
        stderr_save = argparse._sys.stderr
        stdout_save = argparse._sys.stdout
        argparse._sys.stderr = os.devnull
        argparse._sys.stdout = os.devnull
        try:
            command.argparser.parse_known_args(args, args_ns)
        except BaseException:
            pass
        finally:
            argparse._sys.stderr = stderr_save
            argparse._sys.stdout = stdout_save
        return args_ns