def get_ip_address():

  #先获取所有网络接口
  SIOCGIFCONF = 0x8912
  SIOCGIFADDR = 0x8915
  BYTES = 4096     
  sck = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  names = array.array('B',b'\0' * BYTES)
  bytelen = struct.unpack('iL', fcntl.ioctl(sck.fileno(), SIOCGIFCONF, struct.pack('iL', BYTES, names.buffer_info()[0])))[0]
  namestr = names.tostring()
  ifaces = [namestr[i:i+32].split('\0', 1)[0] for i in range(0, bytelen, 32)]

  #再获取每个接口的IP地址
  iplist = []
  for ifname in ifaces:
    ip = socket.inet_ntoa(fcntl.ioctl(sck.fileno(),SIOCGIFADDR,struct.pack('256s',ifname[:15]))[20:24])
    iplist.append(ifname+':'+ip)
  return iplist

def ip_send_mail(iptxt):

  #设置收件邮箱
  toaddrs = 'to@mail.com'
  #设置发送邮箱
  fromaddr = 'send@mail.com'

  #设置发送邮箱的账号密码
  username = 'your_sendmail@mail.com' 
  password = 'your_pass'

  #设置SMTP服务器、端口，根据你的邮箱设置，
  server = smtplib.SMTP('smtp.mail.com:25')
  #设置邮件正文，get_ip_address()返回的是list，要转换成str
  ip = '\r\n'.join(iptxt)

  #设置邮件标题和正文
  msg = MIMEText(ip,'plain', 'utf-8')
  msg['Subject'] = 'IP For RaspberryPi'
  msg['From'] = fromaddr
  msg['To'] = toaddrs

  #启动SMTP发送邮件
  server.ehlo()
  server.starttls()
  server.login(username,password)
  server.sendmail(fromaddr, toaddrs, msg.as_string())
  server.quit()

if __name__ == '__main__':

  #获取IP
  iptxt = get_ip_address()
  #将IP存入文件，如果直接发送邮件，这步可以省略。
  ip_save_file(iptxt)  
  #将IP地址发送到指定邮箱
  ip_send_mail(iptxt)