tuple 就是不可變的 list

tuple 就是不可變的 list.

>>> list = ['c',[1,2,3]]
>>> tuple = ('c',(1,2,3))
>>> list[0]
'c'
>>> list[1]
[1, 2, 3]
>>> tuple[0]
'c'
>>> tuple[1]
(1, 2, 3)
>>> list[0] = 'q'
>>> list[0]
'q'
>>> list[1]
[1, 2, 3]
>>> tuple[0] = 'q'

Traceback (most recent call last):
  File "", line 1, in 
    tuple[0] = 'q'
TypeError: 'tuple' object does not support item assignment