相关疑难解决方法(0)

为什么CPython(没有关于其他Python实现的线索)有以下行为？

tuple1 = ()
tuple2 = ()                                                                                                   
dict1 = {}
dict2 = {}
list1 = []
list2 = []
# makes sense, tuples are immutable
assert(id(tuple1) == id(tuple2))
# also makes sense dicts are mutable
assert(id(dict1) != id(dict2))
# lists are mutable too
assert(id(list1) != id(list2))
assert(id(()) == id(()))
# why no assertion error on this?
assert(id({}) == id({}))
# or this?
assert(id([]) == id([]))

我有一些想法可能,但找不到具体原因.

编辑

进一步证明格伦和托马斯的观点:

[1] id([])
4330909912
[2] x = []
[3] …