Why the list creates in two different ways? Does it cause by the mutability of its elements? Where the Python document explains it?

[Dieter Maurer]

Chris Angelico wrote at 2021-6-15 05:35 +1000:
>On Tue, Jun 15, 2021 at 5:12 AM Jach Feng <jfong at ms4.hinet.net> wrote:
>>
>> >>> n = [(1,2) for i in range(3)]
>> >>> n
>> [(1, 2), (1, 2), (1, 2)]
>> >>> id(n[0]) == id(n[1])  == id(n[2])
>> True
>
>This is three tuples. Tuples are immutable and you get three
>references to the same thing.

In addition: object identity (as revealed by `id(...)`) is
an implementation detail. Do not rely on it!