[Python-Dev] What's a PyStructSequence ?

[M.-A. Lemburg]

Michel Pelletier wrote:
> 
> "M.-A. Lemburg" wrote:
> 
> > Also, why should we hide something useful from the Python
> > programmer if it's there anyway ? (One thing I've always wondered
> > about is why Python doesn't expose Py_True and Py_False through
> > the builtin module...)
> 
> I have no idea why they are not exposed, of course. but my guess would
> be because there is no boolean type, there is no need for them.  I
> myself have never needed a boolean type, "zero" or "empty" have always
> worked for me as a boolean false.
> 
> What are they used at the C level for?

All simple compares return either Py_True or Py_False (e.g. 1==1
returns a reference to Py_True).
 
> > I guess, I'll add a constructor to mx.Tools, my repository
> > for missing builtins ;-)
> 
> Does mx.Tools offer a boolean type?

No, but I'm thinking about adding a Boolean number type to
mxNumber. I'll also need some form of a binary type to make the
set complete for XML-RPC.

Currently, I can work around this by using True and False
(which mx.Tools adds) and using buffer objects as wrappers
to mean "this is a binary type".

-- 
Marc-Andre Lemburg
CEO eGenix.com Software GmbH
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