input: 
  def double_the_difference(lst):
      '''
      Given a list of numbers, return the sum of squares of the numbers
      in the list that are odd. Ignore numbers that are negative or not integers.
      
      double_the_difference([1, 3, 2, 0]) == 1 + 9 + 0 + 0 = 10
      double_the_difference([-1, -2, 0]) == 0
      double_the_difference([9, -2]) == 81
      double_the_difference([0]) == 0  
     
      If the input list is empty, return 0.
      '''
  
output:     if not lst:
          return 0
      
      sum_of_squares = 0
      for num in lst:
          if isinstance(num, int) and num > 0 and num % 2 != 0:
              sum_of_squares += num ** 2
      
      return sum_of_squares