About the implementation of del in Python 3
Jussi Piitulainen
jussi.piitulainen at helsinki.fi
Thu Jul 6 05:05:46 EDT 2017
Chris Angelico writes:
> On Thu, Jul 6, 2017 at 5:35 PM, Jussi Piitulainen
> <jussi.piitulainen at helsinki.fi> wrote:
>> Incidentally, let no one point out that ids are not memory addresses.
>> It says in the interactive help that they are (Python 3.4.0):
>>
>> Help on built-in function id in module builtins:
>>
>> id(...)
>> id(object) -> integer
>>
>> Return the identity of an object. This is guaranteed to be unique
>> among simultaneously existing objects. (Hint: it's the object's
>> memory address.)
>
> Sorry, not the case.
>
>
> Help on built-in function id in module builtins:
>
>>>> help(id)
> id(obj, /)
> Return the identity of an object.
>
> This is guaranteed to be unique among simultaneously existing objects.
> (CPython uses the object's memory address.)
>
>>>> help(id)
> Help on built-in function id in module __builtin__:
>
> id(...)
>
>>>>> help(id)
> Help on built-in function id in module __builtin__:
>
> id(...)
> Return the identity of an object: id(x) == id(y) if and only if x is y.
>
>
> The interactive help does not say that in any version newer than the
> 3.4 that you tested. The function does not return an address, it
> returns an identity.
Excellent. I'm happy to withdraw the prohibition.
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