Question

我正在用Python编写一个应该与软件通信的脚本 “ConsoleApplication.exe”（用C写的）;这最后一次开始等待修复 lenght命令（5个字节）来自他的“stdin”并生成（2-3秒后）他的“stdout”是我应该在我的Python脚本上阅读的输出。

＃

//This is the "ConsoleApplication.c" file
#include <stdio.h>
#include <function.h>

char* command[5];
int main()
{
 while(1)
 {

 scanf("%s\n", &command);
 output = function(command);
 print("%s\n", output);

 }
}

＃

#this is Python code

import subprocess
#start the process
p = subprocess.Popen(['ConsoleApplication.exe'], shell=True, stderr=subprocess.PIPE)
#command to send to ConsoleApplication.exe
command_to_send = "000648"
#this seems to work well but I need to send a command stored into a buffer and if Itry 
#to use sys.stdout.write(command_to_send)nothing will happen. The problem seem that
#sys.stdout.write expect an object I/O FILE
while True:
    out = p.stderr.read(1)
    if out == '' and p.poll() != None:
        break
    if out != '':
        sys.stdout.write(out)
        sys.stdout.flush()

＃

有什么建议吗？我该如何解决？

我尝试使用

stdout = p.communicate(input='test\n')[0]

但是我在运行时遇到以下错误： “TypeError：'str'不支持缓冲区接口” 我也试过这个

from subprocess import Popen, PIPE, STDOUT


p = Popen(['ConsoleApplication.exe'], stdout=PIPE, stdin=PIPE, stderr=PIPE)

out, err = p.communicate(input='00056\n'.encode())
print(out)
out, err = p.communicate(input='00043\n'.encode())
print(out)

但我收到此错误： “ValueError：开始通信后无法发送输入”

Answer 1

看起来这个问题有你的解决方案

Python - How do I pass a string into subprocess.Popen (using the stdin argument)?

使用Popen.communicate（）方法

进程间通信Python

1 个答案: