Practice>Python>Regex and Parsing>Validating UID

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Validating UID

Problem Link : https://www.hackerrank.com/challenges/validating-uid/problem

Difficulty : Easy

 

Tip

• If we sort a given string, we can wrtie regular expression more easier
• Here is how to sort string
• l = [s[i] for i in range(len(s))]
• l.sort()
• l = ''.join(l)
• Write regular expressoin for each conditions
• Find 2 uppercases from sorted string
• Find 3 number from sorted string
• Find 10 characters which is consist of lower/upper case and numbers

 

Solution

import re def my_validate_uid(s): l = [s[i] for i in range(len(s))] l.sort() l = ''.join(l) #print(l) ''' It must contain at least 2 uppercase English alphabet characters. ''' matches = re.findall(r'[A-Z]{2}', l) if len(matches) == 0: #print('not AB') return 'Invalid' ''' It must contain at least 3 digits ( - ). ''' matches = re.findall(r'[0-9]{3}', l) if len(matches) == 0: #print('not 123') return 'Invalid' ''' It should only contain alphanumeric characters ( - , - & - ). There must be exactly characters in a valid UID. ''' matches = re.findall(r'[a-zA-Z0-9]{10}', s) if matches[0] != s: #print('not aA9') return 'Invalid' ''' No character should repeat. ''' for i in range(len(l)-1): if l[i] == l[i+1]: #print('repeat') return 'Invalid' return 'Valid' N = int(input()) for _ in range(N): s = input() print(my_validate_uid(s))