Python's ID () function decryption process

>>> A = 2.5
>>> B = 2.5
>>> C = b
>>> A is C
False

>>> A = 2
>>> B = 2
>>> C = b
>>> A is C
True

Today, when we use the IS function to print a A, a and B are assigned a value of 2.5 and 2, we find that:
>>> A = 2
>>> B = 2
>>> ID (a)
21132060
>>> ID (b)
21132060
>>> A = 2.5
>>> B = 2.5
>>> ID (a)
19622112
>>> ID (b)
29321464

When a, B is 2, the ID is the same, and the time of 2.5 is different, this situation will also appear in string string, that is, when a very short string of a, B and a very short, their ID value is the same, and very long does not;
After that, you can get a simple conclusion: The interpreter did a little bit of optimization on a small int and a very short string, assigning only one object to the same ID.

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