Python3 - Same values different ids

Asked Jul 29 '17 at 14:25

Active Jul 29 '17 at 14:37

Viewed 31 times

I'm having trouble about understanding id in Python3. I always thought holding same value means pointing to same address until i got output like this :

>>> a = 1000
>>> b = 1000
>>> id(a)
140241096743312
>>> id(b)
140241096274640
>>> id(1000)
140241096274800
>>> c = 5
>>> d = 5
>>> id(c)  == id(d)
True

Why am i getting different addresses ? What makes 1000 special or different from 5 so that variables point different addresses ?

edited Jul 29 '17 at 14:37

vaultah

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asked Jul 29 '17 at 14:25

Khan9797

An `id(..)` is an identifier for the *object*. Two objects can have the same value, but be different objects... – Willem Van Onsem Jul 29 '17 at 14:26
2

Furthermore integers between -8 and 255 are cached. So for these integers the `id`s will - on some interpreters - be the same. – Willem Van Onsem Jul 29 '17 at 14:27
and what about strings ? why do i get same address when i assign same strings to different variables ? – Khan9797 Jul 29 '17 at 14:33
Please don't remove the parent [tag:python] tag. Doing so harms discoverability. – vaultah Jul 29 '17 at 14:39

Python3 - Same values different ids

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