Discussion on Validating UID Challenge

2 days ago+ 0 comments

I've had too many regex solutions in a row, so I decided to go a different way for this. I tried to focus on readability (and debugability).

import collections

# A valid UID must:
#
#   * Be exactly 10 characters in length
#   * Only contain alphanumeric characters (a-z, A-Z, 0-9)
#   * Contain at least 2 uppercase English alphabet characters
#   * Contain at least 3 digits (0-9)
#   * Not repeat any character

def validate_uid(uid):
    if len(uid) != 10:
        return False

    if not all( [c.isalnum() for c in uid] ):
        return False

    if sum([c.isupper() for c in uid]) < 2:
        return False

    if sum([c.isdigit() for c in uid]) < 3:
        return False

    if max(collections.Counter(uid).values()) > 1:
        return False

    return True

t = int(input())

for _ in range(t):
    uid = input()
    is_valid = validate_uid(uid)

    message = 'Valid' if is_valid else 'Invalid'
    print(message)

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