1、
>>> a = ("aaa","bbb","ccc","ddd","eee","fff") >>> type(a) <class 'tuple'>
>>> id(a) 1360669254176
>>> a[2] = "xxx" Traceback (most recent call last): File "<pyshell#372>", line 1, in <module> a[2] = "xxx" TypeError: 'tuple' object does not support item assignment >>> a[:1] + (a[1],"xxx") + a[3:] ('aaa', 'bbb', 'xxx', 'ddd', 'eee', 'fff') >>> a = a[:1] + (a[1],"xxx") + a[3:] >>> a ('aaa', 'bbb', 'xxx', 'ddd', 'eee', 'fff') >>> id(a) 1360669566816