如何从Ping结果中读取特定值

import re
import subprocess

def get_ping_result(target_host):
    # 执行Ping命令并获取输出
    ping_process = subprocess.Popen(["ping", "-c", "4", target_host], stdout=subprocess.PIPE)
    ping_output = ping_process.communicate()[0].decode("utf-8")

    return ping_output

def extract_specific_value(ping_result):
    # 使用正则表达式提取特定值
    match = re.search(r"平均 = (\d+)ms", ping_result)
    if match:
        average_value = match.group(1)
        return average_value
    else:
        return None

# 示例用法
target_host = "www.example.com"
ping_result = get_ping_result(target_host)
specific_value = extract_specific_value(ping_result)

if specific_value:
    print("特定值为:", specific_value)
else:
    print("未找到特定值")