I am trying to validate if the string of numbers is valid IP address or not.

There are mere 2 logics that i am using as shown in code-

• The length of ipnos should be 4 after the split('.')
• The strings should be numbers only.

But looks like it is NOT giving me correct result.

For ip='123.456.78.09' : It should result True but it returning False

def validate(ip):
  ipnos=ip.split('.')
  validnos=[0,1,2,3,4,5,6,7,8,9]
  false_counter=0

  if len(ipnos) != 4:
    false_counter =1

  for sublist in ipnos:
    for nos in range(len(sublist)):
      if sublist[nos] not in validnos:
        false_counter =1

  
  if false_counter>0:
    return False
  else:
    return True

ip='123.456.78.09'
validate(ip)

CodePudding user response：

The type of sublist[nos] is <class 'str'>, not <class 'int'>.

So, you should change the validnos to next to fix it:

validnos=['0','1','2','3','4','5','6','7','8','9']