text: # https://py.checkio.org/en/mission/count-digits/
  
  '''
  You need to count the number of digits in a given string.
  '''
  
  def count_digits(text: str) -> int:
      # your code here
      return sum(ch.isdigit() for ch in text)
  
  
  if __name__ == '__main__':
      print("Example:")
      print(count_digits('hi'))
  
      # These "asserts" are used for self-checking and not for an auto-testing
      assert count_digits('hi') == 0
      assert count_digits('who is 1st here') == 1
      assert count_digits('my numbers is 2') == 1
      assert count_digits('This picture is an oil on canvas '
   'painting by Danish artist Anna '
   'Petersen between 1845 and 1910 year') == 8
      assert count_digits('5 plus 6 is') == 2
      assert count_digits('') == 0
      print("Coding complete? Click 'Check' to earn cool rewards!")
  