How to locate digits and capital letters in a Python string

Is there a way to locate capital letters and digits in a string?

Here is the code I have so far:

# Imports


import random

# Variables

my_score = 0
loop = True

# start

while loop == True:

  username = input("Enter your username")

  has_digit = False
  has_upper = False

I tried searching Google but I couldn’t find anything that seems to work, any ideas?

>Solution :

import re

has_upper = True if re.search('[A-Z]', username) else False
has_digit = True if re.search('\d', username) else False