gistfile1.txt

>>> dis.dis(foo)
  2           0 BUILD_LIST               0
              3 STORE_FAST               0 (a)

  3           6 LOAD_FAST                0 (a)
              9 LOAD_CONST               1 ('bleh')
             12 INPLACE_ADD
             13 STORE_FAST               0 (a)

  4          16 LOAD_FAST                0 (a)
             19 LOAD_CONST               2 ('bluh')
             22 INPLACE_ADD
             23 STORE_FAST               0 (a)

  5          26 LOAD_GLOBAL              0 (print)
             29 LOAD_CONST               3 ('')
             32 LOAD_ATTR                1 (join)
             35 LOAD_FAST                0 (a)
             38 CALL_FUNCTION            1 (1 positional, 0 keyword pair)
             41 CALL_FUNCTION            1 (1 positional, 0 keyword pair)
             44 POP_TOP
             45 LOAD_CONST               0 (None)
             48 RETURN_VALUE
>>> dis.dis(bar)
  2           0 LOAD_CONST               1 ('')
              3 STORE_FAST               0 (a)

  3           6 LOAD_FAST                0 (a)
              9 LOAD_CONST               2 ('bleh')
             12 INPLACE_ADD
             13 STORE_FAST               0 (a)

  4          16 LOAD_FAST                0 (a)
             19 LOAD_CONST               3 ('bluh')
             22 INPLACE_ADD
             23 STORE_FAST               0 (a)

  5          26 LOAD_GLOBAL              0 (print)
             29 LOAD_FAST                0 (a)
             32 CALL_FUNCTION            1 (1 positional, 0 keyword pair)
             35 POP_TOP
             36 LOAD_CONST               0 (None)
             39 RETURN_VALUE