text: # https://py.checkio.org/en/mission/all-upper/
  
  def is_all_upper(text: str) -> bool:
      return True if text == text.upper() else False
  
  
  if __name__ == '__main__':
      print("Example:")
      print(is_all_upper('ALL UPPER'))
  
      # These "asserts" are used for self-checking and not for an auto-testing
      assert is_all_upper('ALL UPPER') == True
      assert is_all_upper('all lower') == False
      assert is_all_upper('mixed UPPER and lower') == False
      assert is_all_upper('') == True
      print("Coding complete? Click 'Check' to earn cool rewards!")
  