题解 | #验证IP地址#
验证IP地址
https://www.nowcoder.com/practice/55fb3c68d08d46119f76ae2df7566880
class Solution:
def solve(self , IP: str) -> str:
# write code here
def isValid4(s):
lst = s.split('.')
if len(lst) != 4:
return False
for num in lst:
if not num:
return False
if not num.isdigit():
return False
if int(num) != 0 and num[0] == '0':
return False
if int(num) < 0 or int(num) > 255:
return False
return True
def isValid6(s):
lst = s.split(':')
if len(lst) != 8:
return False
for num in lst:
if not num:
return False
if len(num) > 4:
return False
for c in num:
if c.isalpha():
if ord('f') < ord(c) <= ord('z') or ord('F') < ord(c) <= ord('Z'):
return False
return True
if isValid4(IP): return 'IPv4'
elif isValid6(IP): return 'IPv6'
else: return 'Neither'
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