在python中使用ping命令时仅输出ping延迟

import subprocess

def ping(host):
    try:
        # 执行ping命令
        ping_process = subprocess.Popen(["ping", "-c", "4", host], stdout=subprocess.PIPE)
        ping_output = ping_process.communicate()[0].decode("utf-8")

        # 解析ping输出，提取延迟信息
        lines = ping_output.split("\n")
        for line in lines:
            if "time=" in line:
                delay = line.split("time=")[1].split(" ")[0]
                print(f"Ping延迟：{delay}ms")
                break
        else:
            print("无法获取Ping延迟")

    except subprocess.CalledProcessError:
        print("执行ping命令时出错")

# 调用ping函数，传入要ping的主机地址或域名
ping("www.example.com")