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Re: attribute is accessed from Nonetype

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  Re: attribute is accessed from Nonetype Chris Angelico <rosuav@gmail.com> - 2012-08-04 08:41 +1000
    Re: attribute is accessed from Nonetype Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-04 00:23 +0000

#26458 — Re: attribute is accessed from Nonetype

On Sat, Aug 4, 2012 at 8:20 AM, Dave Angel <d@davea.name> wrote:
> I'm sorry, what's not clear?  Nonetype is not the same as NoneType.
> Python is case sensitive.

There isn't a NoneType either. I get a NameError.

ChrisA

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#26463

On Sat, 04 Aug 2012 08:41:20 +1000, Chris Angelico wrote:

> On Sat, Aug 4, 2012 at 8:20 AM, Dave Angel <d@davea.name> wrote:
>> I'm sorry, what's not clear?  Nonetype is not the same as NoneType.
>> Python is case sensitive.
> 
> There isn't a NoneType either. I get a NameError.

Shame on you :-P 

Ramit Prasad showed exactly how you can see NoneType in action in the 
part of the post you snipped from your reply.

py> len(None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: object of type 'NoneType' has no len()


NoneType *is* a standard type. It's just not bound to a publicly 
accessible name in the built-ins. But you can easily get access to the 
class using either:

type(None)
None.__class__

or in Python 2.6 at least, 

import types
types.NoneType

(although it has been removed from Python 3.2 for some reason).



-- 
Steven

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