From DXDragon at yandex.ru  Mon Feb 13 17:43:47 2012
From: DXDragon at yandex.ru (=?utf-8?B?0KDQvtC80LDQvSDQlNC+0L3Rh9C10L3QutC+?=)
Date: Mon, 13 Feb 2012 20:43:47 +0400
Subject: [Doc-SIG] __self__ on built-in functions
Message-ID: <op.v9ml29bk3qy9a8@tortoise>

Hello,

The language reference for Python 3.2 (and the development version, as  
well), says this in section 3.2:

~
Built-in functions

A built-in function object is a wrapper around a C function. Examples of  
built-in functions are len() and math.sin() (math is a standard built-in  
module). <...> Special read-only attributes: <...> __self__ is set to None  
(but see the next item) <...>.
~

Now I don't know whether it's a bug in Python or in the docs, but that  
doesn't seem to be the case:

ActivePython 3.2.2.3 (ActiveState Software Inc.) based on
Python 3.2.2 (default, Sep  8 2011, 10:55:13) [MSC v.1500 64 bit (AMD64)]  
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> len.__self__
<module 'builtins' (built-in)>
>>> open.__self__
<module 'io' (built-in)>
>>> import math
>>> math.sin.__self__
<module 'math' (built-in)>

Thoughts?

Roman.


From fuzzyman at voidspace.org.uk  Mon Feb 13 18:40:57 2012
From: fuzzyman at voidspace.org.uk (Michael Foord)
Date: Mon, 13 Feb 2012 17:40:57 +0000
Subject: [Doc-SIG] __self__ on built-in functions
In-Reply-To: <op.v9ml29bk3qy9a8@tortoise>
References: <op.v9ml29bk3qy9a8@tortoise>
Message-ID: <4F394B29.5060703@voidspace.org.uk>

On 13/02/2012 16:43, ????? ???????? wrote:
> Hello,
>
> The language reference for Python 3.2 (and the development version, as 
> well), says this in section 3.2:
>
> ~
> Built-in functions
>
> A built-in function object is a wrapper around a C function. Examples 
> of built-in functions are len() and math.sin() (math is a standard 
> built-in module). <...> Special read-only attributes: <...> __self__ 
> is set to None (but see the next item) <...>.
> ~
>
> Now I don't know whether it's a bug in Python or in the docs, but that 
> doesn't seem to be the case:
>
> ActivePython 3.2.2.3 (ActiveState Software Inc.) based on
> Python 3.2.2 (default, Sep  8 2011, 10:55:13) [MSC v.1500 64 bit 
> (AMD64)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> len.__self__
> <module 'builtins' (built-in)>
>>>> open.__self__
> <module 'io' (built-in)>
>>>> import math
>>>> math.sin.__self__
> <module 'math' (built-in)>
>
> Thoughts?
>

Yep, that seems like a documentation bug. Please file an issue for it.

All the best,

Michael

> Roman.
>
> _______________________________________________
> Doc-SIG maillist  -  Doc-SIG at python.org
> http://mail.python.org/mailman/listinfo/doc-sig
>


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