Standard input is empty

Genexp:
  3           0 LOAD_FAST                0 (.0)
        >>    3 FOR_ITER                15 (to 21)
              6 STORE_FAST               1 (x)
              9 LOAD_FAST                1 (x)
             12 LOAD_FAST                1 (x)
             15 BINARY_MULTIPLY
             16 YIELD_VALUE
             17 POP_TOP
             18 JUMP_ABSOLUTE            3
        >>   21 LOAD_CONST               0 (None)
             24 RETURN_VALUE

Generator function:
  9           0 SETUP_LOOP              23 (to 26)
              3 LOAD_FAST                0 (outer_iterable)
              6 GET_ITER
        >>    7 FOR_ITER                15 (to 25)
             10 STORE_FAST               1 (x)

 10          13 LOAD_FAST                1 (x)
             16 LOAD_FAST                1 (x)
             19 BINARY_MULTIPLY
             20 YIELD_VALUE
             21 POP_TOP
             22 JUMP_ABSOLUTE            7
        >>   25 POP_BLOCK
        >>   26 LOAD_CONST               0 (None)
             29 RETURN_VALUE