小编Chi*_*aJa的帖子

    >>>a=[999999,2,3]
    >>>b=[999999,2,3]
    >>>print(a[0] is b[0])
    False#because it works for numbers -5 through 256
    >>>a=[1,2,3]
    >>>b=a[:]
    >>>print(a[0] is b[0])
    True#because it works for numbers -5 through 256
    >>>a=[999999,2,3]
    >>>b=a[:]
    >>>print(a[0] is b[0])
    True#why not False ???

发生了什么b = a [:](为什么不适用于数字-5到256)？

>>> c=[1,2,3]
>>> c[1]=c 
>>> d=[1,2,3]
>>> d[1:]=d

>>> print(c)
[1, [...], 3] # Why does C become [1, [...], 3]?
>>> print(d)
[1, 1, 2, 3] # Why is d not [1, [...] ]?

对不起,代码在哪里不同？它是:,还是其他什么？