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

[Jach Feng]

>>> 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
>>> m = [[1,2] for i in range(3)]
>>> m
[[1, 2], [1, 2], [1, 2]]
>>> id(m[0]) == id(m[1])  == id(m[2])
False
>>>

--Jach