如何阻止SIGINT传递给python中的子进程？

import os
import signal
import subprocess

def handle_sigint(signum, frame):
    pass

signal.signal(signal.SIGINT, handle_sigint)

# 创建子进程
child_process = subprocess.Popen(['python', 'child_process.py'])

# 等待子进程结束
child_process.wait()

import os
import subprocess

# 将当前进程放入新的进程组
os.setpgrp()

# 创建子进程
child_process = subprocess.Popen(['python', 'child_process.py'])

# 等待子进程结束
child_process.wait()

import subprocess

# 创建子进程
child_process = subprocess.Popen(['nohup', 'python', 'child_process.py'])

# 等待子进程结束
child_process.wait()

import subprocess

try:
    # 创建子进程
    child_process = subprocess.Popen(['python', 'child_process.py'])

    # 等待子进程结束
    child_process.wait()
except KeyboardInterrupt:
    pass