def getresults(self):
    key = str(input("Ключевое слово: "))
    if not key == keyword:
        print("Неверный пароль.")
        exit()
    else:
        connection = sqlite3.connect("login_db.db")
        cursor = connection.cursor()
        cursor.execute("SELECT fav_color_ind FROM un")
        indexes = [h for h in cursor.fetchone()]
        print(indexes)

 >>> indexes = [h for h in cursor.fetchone()]
print(indexes)
["613", "613", "33", "56"]
>>>

 >>> a = ['red', 'red', 'blue', 'black']
>>> a.count('red')
2
>>> a.count('red')/len(a)*100
50.0
>>> a.count('black')/len(a)*100
25.0