Let's say my list a is [1,2,3] which points to address 53367992
>>> a = [1,2,3]
>>> id(a)
53367992
Now, when I add [9] to this list, I understand the change of address, now l points to 53368552
>>> a = a + [9]
>>> a
[1, 2, 3, 9]
>>> id(a)
53368552
In this below case, I do not understand why a is pointing to same address even after adding [4] to a
>>> a = [1,2,3]
>>> id(a)
53361720
>>> a += [9]
>>> a
[1, 2, 3, 9]
>>> id(a)
53361720
Could you guys please explain me what is the difference between a = a +[9] and a += [9] (how come this acts as appending) operation in list?
