python IPv6 十进制和十六进制互转

IPv6 转 十进制：

 #!/usr/bin/python
 # -*- coding: UTF-8 -*-

 import re

 def ipv62dec(ipv6):
     if checkipv6(ipv6):
         compressIndex = ipv6.find('::')
         print("compressIndex:"+str(compressIndex))

         ipv4Index = ipv6.find('.')
         print("ipv4Index:"+str(ipv4Index))

         if compressIndex==-1 and ipv4Index==-1:
             print 'num: %d' % (noCompressipv62dec(ipv6))
         elif compressIndex!=-1 and ipv4Index==-1:
             print 'num: %d' % (compressipv62dec(ipv6))
         elif compressIndex==-1 and ipv4Index!=-1:
             ipv4,ipv6=ipv4v6Split(ipv6)
             if ipv4 and ipv6:
                 print 'num: %d' % (ipv42dec(ipv4)+noCompressipv62dec(ipv6))
             else:
                 return ""
         elif compressIndex != -1 and ipv4Index != -1:
             ipv4, ipv6 = ipv4v6Split(ipv6)
             if ipv4 and ipv6:
                 print 'num: %d' % (ipv42dec(ipv4)+compressipv62dec(ipv6))
             else:
                 return ""
         else:
             return ""
     else:
         return ""

 def ipv42dec(ip):
     dec_value = 0
     v_list = ip.split('.')
     v_list.reverse()
     t = 1
     for v in v_list:
         dec_value += int(v) * t
         t = t * (2 ** 8)
     return dec_value

 #Ipv6每段不补齐0 形成完整的4位，如2001:DB8:0:23:8:800:200C:417A，补齐为2001:0DB8:0000:0023:0008:0800:200C:417A
 def ipseg2str(ipseglist):
     ipstr=''
     for ipseg in ipseglist:
         if len(ipseg) == 1:
             ipseg = '' + ipseg
         elif len(ipseg) == 2:
             ipseg = '' + ipseg
         elif len(ipseg) == 3:
             ipseg = '' + ipseg
         elif len(ipseg) == 4:
             ipseg = ipseg
         else:
             return ""
         ipstr += ipseg
     return ipstr

 ##没有0压缩的Ipv6转换为十进制，如2001:DB8:0:23:8:800:200C:417A
 def noCompressipv62dec(ipv6):
     iplist = ipv6.split(":")
     if iplist:
         ipstr = ipseg2str(iplist)
         print(ipstr)
         return int(ipstr, 16)
     else:
         return ""

 #带0压缩的ipv6转换为十进制，如FF01::1101
 def compressipv62dec(ipv6):
     compressList = ipv6.split("::")
     print("compressList:" + str(compressList))
     ipstr = ""
     part1 = []
     part2 = []
     if len(compressList) == 2:
         part1 = compressList[0].split(":") if compressList[0] else []
         part2 = compressList[1].split(":") if compressList[1] else []
     if part1 or part2:
         ipstr += ipseg2str(part1)
         for i in range(8 - len(part1) - len(part2)):
             ipstr += ''
         ipstr += ipseg2str(part2)
         print("ipstr:" + ipstr)
         return int(ipstr, 16)
     else:
         return ""

 #将内嵌ipv4的ipv6中的ipv6和ipv4分隔开，如FFFF::192.168.0.1  分隔为ipv4 192.168.0.1  ipv6 FFFF::0000:0000
 def ipv4v6Split(ipv6):
     ipv4str = ''
     ipv6str = ''
     if checkipv6(ipv6):
         list = ipv6.split(":")
         if list:
             ipv4str = list[len(list) - 1]
             list.pop()
             ipv6str = ":".join(list) + ":0000:0000"
             print("ipv4:" + ipv4str)
             print("ipv6:" + ipv6str)
     return ipv4str,ipv6str

 #校验ipv6的格式
 def checkipv6(ipv6):
     matchobj = re.match(r'^\s*((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))(%.+)?\s*$',ipv6)
     if matchobj:
         return True
     else:
         return False

 ipv62dec('55555:5e:0:0:0:0:0:5668:eeee')
 ipv62dec('5555:5e:0:0:0:0:0:5668')
 ipv62dec('5555:5e::5668')
 ipv62dec('5555:5e::')
 ipv62dec('::5555:5e')
 ipv62dec('2001:DB8:0:23:8:800:192.168.0.1')
 ipv62dec('FFFF::192.168.0.1')
 ipv62dec('::192.168.0.1')
 ipv62dec('::FFFF:192.168.0.1')

十进制 转 IPv6：

 #!/usr/bin/python
 # -*- coding: UTF-8 -*-

 import re

 #将ipv6中段中的0压缩，如005e 压缩为5e
 def subZero(ipseg):
     index=0
     for i in range(len(ipseg)):
         if ipseg[i]=='':
             index+=1
         else:
             break
     if index>=2:
         return ipseg[index:] if ipseg[index:] else ''
     else:
         return ipseg

 #将十进制数转换为ipv6
 def dec2ipv6(dec):
     if checkdec(dec) and int(dec)<=340282366920938463463374607431768211455:
         hexstr=(hex(int(dec)))[2:]
         hexstrlen = len(hexstr)
         while hexstrlen<32:
             hexstr=''+hexstr
             hexstrlen+=1
         result=subZero(hexstr[0:4])+":"+subZero(hexstr[4:8])+":"+subZero(hexstr[8:12])+":"+subZero(hexstr[12:16])+":"+subZero(hexstr[16:20])+":"+subZero(hexstr[20:24])+":"+subZero(hexstr[24:28])+":"+subZero(hexstr[28:])
         print("result:"+result)
         return result
     else:
         return ""

 #校验十进制数字
 def checkdec(dec):
     matchobj = re.match(r'(0[dD])?[0-9]+$',dec)
     if matchobj:
         return True
     else:
         return False

 dec2ipv6('')
 dec2ipv6('')
 dec2ipv6('')
 dec2ipv6('')
 dec2ipv6('')