Validating UID - Hackerrank

validating_uid.py

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


def uid_validator(uid):

    characters = list(uid)

    if len(uid) != 10:
        # print("Length property missed.")
        return False

    # Checks alphanumeric property
    try:
        first_char = int(characters[0])
    except ValueError:
        pass
    else:
        # print("Alphanumeric Property missed.")
        return False

    # Miniumum digits and uppercase letter property
    digit_count = 0
    uppercase_count = 0
    for char in characters:
        try:
            if characters.count(char) > 1:
                # print("Repeated Character found.")
                return False
            if int(char) in range(10):
                digit_count += 1
        except ValueError:
            if char.isupper():
                uppercase_count += 1
            continue

    if digit_count < 3 and uppercase_count < 3:
        # print("Minimum Digit or Uppercase property missed.")
        return False

    return True


if __name__ == "__main__":

    input_no = int(input())
    for i in range(input_no):
        uid = input()
        if uid_validator(uid):
            print("Valid")
        else:
            print("Invalid")