python獲取PING結果

• 2020 年 1 月 9 日
• 筆記

      項目需要，寫下這段腳本

      通過subprocess.Popen調用系統的ping.exe，獲得ping結果文本，再通過正則表達式從結果文本中提取需要的參數。需要考慮中文和英文兩種返回結果。

      通過這個簡單的程式，靜下心來學習了Python的正則表達式，了解了re.match, re.search, re.findall之間的不同。以前總是懵懵懂懂一知半解地亂用，覺得自己還是太浮躁了。

戒驕戒躁！！！

def getPING(domain):      ''' 調用系統自帶的ping.exe實現PING domain，返回值為：ip,丟包率,最短，最長，平均'''      p = subprocess.Popen(["ping.exe", domain], stdin = subprocess.PIPE, stdout = subprocess.PIPE, stderr = subprocess.PIPE, shell = True)      out = p.stdout.read().decode('gbk')      regIP = r'[d+.d+.d+.d+]'               ## Pinging www.a.shifen.com [115.239.211.112] with 32 bytes of data      regLost = r'(d+%'                             ## Packets: Sent = 4, Received = 4, Lost = 0 (0% loss)   數據包: 已發送 = 4，已接收 = 4，丟失 = 0 (0% 丟失)，      regMinimum = u'Minimum = d+ms|最短 = d+ms'     ## Minimum = 37ms, Maximum = 38ms, Average = 37ms   最短 = 37ms，最長 = 77ms，平均 = 48ms      regMaximum = u'Maximum = d+ms|最長 = d+ms'      regAverage = u'Average = d+ms|平均 = d+ms'      ip = re.search(regIP, out)      lost = re.search(regLost, out)      minimum = re.search(regMinimum, out)      maximum = re.search(regMaximum, out)      average = re.search(regAverage, out)      if ip:          ip = ip.group()[1:-1]      if lost:          lost = lost.group()[1:]      if minimum:          minimum = filter(lambda x:x.isdigit(),minimum.group())      if maximum:          maximum = filter(lambda x:x.isdigit(),maximum.group())      if average:          average = filter(lambda x:x.isdigit(),average.group())      return (ip,lost,minimum,maximum,average)