与Python子进程通信

import subprocess

# 执行命令并等待完成
completed_process = subprocess.run(['ls', '-l'], capture_output=True, text=True)

# 打印命令的输出
print(completed_process.stdout)

import subprocess

# 创建一个子进程
process = subprocess.Popen(['ls', '-l'], stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)

# 读取子进程的输出
stdout, stderr = process.communicate()

# 打印命令的输出
print(stdout)

import subprocess

# 创建一个子进程
process = subprocess.Popen(['cat'], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)

# 向子进程发送数据
process.stdin.write('Hello, World!\n')
process.stdin.flush()

# 从子进程读取数据
output = process.stdout.readline()
print(output.strip())

# 关闭子进程的输入管道以结束进程
process.stdin.close()
return_code = process.wait()