unpacking

gistfile1.txt

>>> def f1():
...     a,b = 1,2
... 
>>> import dis
>>> def f2():
...     a,b = [1,2]
... 
>>> dis.dis(f1)
  2           0 LOAD_CONST               3 ((1, 2))
              3 UNPACK_SEQUENCE          2
              6 STORE_FAST               0 (a)
              9 STORE_FAST               1 (b)
             12 LOAD_CONST               0 (None)
             15 RETURN_VALUE        
>>> dis.dis(f2)
  2           0 LOAD_CONST               1 (1)
              3 LOAD_CONST               2 (2)
              6 ROT_TWO             
              7 STORE_FAST               0 (a)
             10 STORE_FAST               1 (b)
             13 LOAD_CONST               0 (None)
             16 RETURN_VALUE