我需要将用户提供的输入复制到子进程。 如何复制输入给子进程stdIn的输入？

I need to copy all the input provided by the user for the child process during its execution. I have tried to scan the cmd.Stdin for the copy of input but can't get it. Am I missing something here?

func main(){
  cmd:= exec.Command("python", "-i")
  cmd.Stdin = os.Stdin
  cmd.Stdout = os.Stdout
  cmd.Stderr = os.Stderr

  buff := bufio.NewScanner(cmd.Stdin)

  go func(){
    for buff.Scan(){
      fmt.Println(buff.Text())
    }
  }()

  _ = cmd.Run()  
}

I think you'll actually need to capture the input, and pass it to the subprocess...

func main(){
  cmd := exec.Command("python", "-i")
  stdin, err := cmd.StdinPipe()
  if err != nil {
      panic(err)
  }
  cmd.Stdout = os.Stdout
  cmd.Stderr = os.Stderr

  buff := bufio.NewScanner(os.Stdin)

  go func(){
    for buff.Scan(){
      input := buff.Text()
      fmt.Println(input)
      io.WriteString(stdin, input)
    }
  }()

  cmd.Start()  
  cmd.Wait()
}