# Python 2.7
In [1]: def get_list_of_tuples():
   ....:     return [(i,) for i in range(10**6)]
   ....:
In [2]: import dis
In [3]: dis.dis(get_list_of_tuples)
  2           0 BUILD_LIST               0
              3 LOAD_GLOBAL              0 (range)
              6 LOAD_CONST               3 (1000000)
              9 CALL_FUNCTION            1
             12 GET_ITER
        >>   13 FOR_ITER                15 (to 31)
             16 STORE_FAST               0 (i)
             19 LOAD_FAST                0 (i)
             22 BUILD_TUPLE              1
             25 LIST_APPEND              2
             28 JUMP_ABSOLUTE           13
        >>   31 RETURN_VALUE

#Python 2.6
2           0 BUILD_LIST               0
              3 DUP_TOP
              4 STORE_FAST               0 (_[1])
              7 LOAD_GLOBAL              0 (range)
             10 LOAD_CONST               3 (1000000)
             13 CALL_FUNCTION            1
             16 GET_ITER
        >>   17 FOR_ITER                16 (to 36)
             20 STORE_FAST               1 (i)
             23 LOAD_FAST                0 (_[1])
             26 LOAD_FAST                1 (i)
             29 BUILD_TUPLE              1
             32 LIST_APPEND
             33 JUMP_ABSOLUTE           17
        >>   36 DELETE_FAST              0 (_[1])
             39 RETURN_VALUE