| f | def seesaw(sequence): | f | def seesaw(sequence): | 
             |     evens = [] |  |     evens = [] | 
             |     odds = [] |  |     odds = [] | 
             |     for number in sequence: |  |     for number in sequence: | 
             |         if number % 2 == 0: |  |         if number % 2 == 0: | 
             |             evens.append(number) |  |             evens.append(number) | 
             |         else: |  |         else: | 
             |             odds.append(number) |  |             odds.append(number) | 
            | t |     i, j = (0, 0) | t |     even_idx, odd_idx = (0, 0) | 
             |     while i < len(evens) or j < len(odds): |  |     while even_idx < len(evens) or odd_idx < len(odds): | 
             |         if i < len(evens): |  |         if even_idx < len(evens): | 
             |             yield evens[i] |  |             yield evens[even_idx] | 
             |             i += 1 |  |             even_idx += 1 | 
             |         if j < len(odds): |  |         if odd_idx < len(odds): | 
             |             yield odds[j] |  |             yield odds[odd_idx] | 
             |             j += 1 |  |             odd_idx += 1 |