python - 使用 Python 和正则表达式解析 windows 命令结果

Question

我正在使用以下代码对网站执行 ping 操作以检查连接情况。我如何解析结果以获取“Lost =”以查看丢失了多少？

def pingTest():
    host = "www.wired.com"
    ping = subprocess.Popen(
        ["ping","-n","4",host],
        stdout = subprocess.PIPE,
        stderr = subprocess.PIPE
    )

    out,error = ping.communicate()
    print out

这是我从外面得到的返回

Pinging wired.com [173.223.232.42] with 32 bytes of data:
Reply from 173.223.232.42: bytes=32 time=54ms TTL=51
Reply from 173.223.232.42: bytes=32 time=54ms TTL=51
Reply from 173.223.232.42: bytes=32 time=54ms TTL=51
Reply from 173.223.232.42: bytes=32 time=54ms TTL=51

Ping statistics for 173.223.232.42:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 54ms, Maximum = 54ms, Average = 54ms

Answer 1

第 1 步:构建将匹配 Lost = 0(0% 损失) 的正则表达式，使用 \d 标记替换数值，数值会有所不同.使用捕获组来保留这些值。

第 2 步:使用 re.search 扫描 out 字符串。

第 3 步:从 re 的捕获组中提取值。