text: import re
  
  
  class UserProcessor:
      """ Helper class for extracting user names out of OCR-read text """
  
      USERNAME_REGEX = r"@[A-Za-z0-9_]{4,15}"
  
      @staticmethod
      def find_users(text):
          """ Returns all user names found within the total OCR text as list of strings """
          return re.findall(UserProcessor.USERNAME_REGEX, text)
  