本文主要研究的是使用Python獲取本機所有網卡ip，掩碼和廣播地址，分享了相關的實例代碼，具體介紹如下。

搜了一天，竟然沒找到一段合適的代碼來獲取機器中所有網卡的ip，掩碼和廣播地址，大部分都是用socket，但是socket通常返回的要不就是內網地址，要不就是公網地址，不能夠找到所有地址，真的太憂桑了，決定自己通過ifconfig或ipconfig的返回信息，一步步地過濾了。這次的代碼主要用到了正則表達式和subprocess模塊，而且為了兼容所有平臺（win，linux和mac），也用到了platform來判斷系統類型，不說太多，代碼如下：

import subprocessimport reimport platformdef find_all_ip(platform): ipstr = '([0-9]{1,3}/.){3}[0-9]{1,3}' if platform == "Darwin" or platform == "Linux":  ipconfig_process = subprocess.Popen("ifconfig", stdout=subprocess.PIPE)  output = ipconfig_process.stdout.read()  ip_pattern = re.compile('(inet %s)' % ipstr)  if platform == "Linux":   ip_pattern = re.compile('(inet addr:%s)' % ipstr)  pattern = re.compile(ipstr)  iplist = []  for ipaddr in re.finditer(ip_pattern, str(output)):   ip = pattern.search(ipaddr.group())   if ip.group() != "127.0.0.1":    iplist.append(ip.group())  return iplist elif platform == "Windows":  ipconfig_process = subprocess.Popen("ipconfig", stdout=subprocess.PIPE)  output = ipconfig_process.stdout.read()  ip_pattern = re.compile("IPv4 Address(/. )*: %s" % ipstr)  pattern = re.compile(ipstr)  iplist = []  for ipaddr in re.finditer(ip_pattern, str(output)):   ip = pattern.search(ipaddr.group())   if ip.group() != "127.0.0.1":    iplist.append(ip.group())  return iplistdef find_all_mask(platform): ipstr = '([0-9]{1,3}/.){3}[0-9]{1,3}' maskstr = '0x([0-9a-f]{8})' if platform == "Darwin" or platform == "Linux":  ipconfig_process = subprocess.Popen("ifconfig", stdout=subprocess.PIPE)  output = ipconfig_process.stdout.read()  mask_pattern = re.compile('(netmask %s)' % maskstr)  pattern = re.compile(maskstr)  if platform == "Linux":   mask_pattern = re.compile(r'Mask:%s' % ipstr)   pattern = re.compile(ipstr)  masklist = []  for maskaddr in mask_pattern.finditer(str(output)):   mask = pattern.search(maskaddr.group())   if mask.group() != '0xff000000' and mask.group() != '255.0.0.0':    masklist.append(mask.group())  return masklist elif platform == "Windows":  ipconfig_process = subprocess.Popen("ipconfig", stdout=subprocess.PIPE)  output = ipconfig_process.stdout.read()  mask_pattern = re.compile(r"Subnet Mask (/. )*: %s" % ipstr)  pattern = re.compile(ipstr)  masklist = []  for maskaddr in mask_pattern.finditer(str(output)):   mask = pattern.search(maskaddr.group())   if mask.group() != '255.0.0.0':    masklist.append(mask.group())  return masklistdef get_broad_addr(ipstr, maskstr): iptokens = map(int, ipstr.split(".")) masktokens = map(int, maskstr.split(".")) broadlist = [] for i in range(len(iptokens)):  ip = iptokens[i]  mask = masktokens[i]  broad = ip & mask | (~mask & 255)  broadlist.append(broad) return '.'.join(map(str, broadlist))def find_all_broad(platform): ipstr = '([0-9]{1,3}/.){3}[0-9]{1,3}' if platform == "Darwin" or platform == "Linux":  ipconfig_process = subprocess.Popen("ifconfig", stdout=subprocess.PIPE)  output = (ipconfig_process.stdout.read())  broad_pattern = re.compile('(broadcast %s)' % ipstr)  if platform == "Linux":   broad_pattern = re.compile(r'Bcast:%s' % ipstr)  pattern = re.compile(ipstr)  broadlist = []  for broadaddr in broad_pattern.finditer(str(output)):   broad = pattern.search(broadaddr.group())   broadlist.append(broad.group())  return broadlist elif platform == "Windows":  iplist = find_all_ip(platform)  masklist = find_all_mask(platform)  broadlist = []  for i in range(len(iplist)):   broadlist.append(get_broad_addr(iplist[i], masklist[i]))  return broadlistsystem = platform.system()print(find_all_ip(system))print(find_all_mask(system))print(find_all_broad(system))