[ANN] PyYAML-3.06: YAML parser and emitter for Python

========================
  Announcing PyYAML-3.06
========================

A new bug fix release of PyYAML is now available:

     http://pyyaml.org/wiki/PyYAML

Changes
=======

* setup.py checks whether LibYAML is installed and if so, builds
   and installs LibYAML bindings.  To force or disable installation
   of LibYAML bindings, use '--with-libyaml' or '--without-libyaml'
   options respectively.
* Building LibYAML bindings no longer requires Pyrex installed.
* 'yaml.load()' raises an exception if the input stream contains
   more than one YAML document.
* Fixed exceptions produced by LibYAML bindings.
* Fixed a dot '.' character being recognized as !!float.
* Fixed Python 2.3 compatibility issue in constructing !!timestamp
   values.
* Windows binary packages are built against the LibYAML stable branch.
* Added attributes 'yaml.__version__' and  'yaml.__with_libyaml__'.

Resources
=========

PyYAML homepage: http://pyyaml.org/wiki/PyYAML
PyYAML documentation: http://pyyaml.org/wiki/PyYAMLDocumentation

Re: [ANN] PyYAML-3.06: YAML parser and emitter for Python

On Fri, 03 Oct 2008 22:28:12 +0300 Kirill Simonov <xi@...> wrote:
>========================
>  Announcing PyYAML-3.06
>========================
>
>A new bug fix release of PyYAML is now available:
>
>     http://pyyaml.org/wiki/PyYAML
>
>
>Changes
>=======
>
...
>* Building LibYAML bindings no longer requires Pyrex installed.
...

I'm wondering if there is any benifit to dropping/retaining Pyrex as a 
build dependency in the Debian package?  What's difference if I build 
with/without it?  

In case it matters, I build with libyaml bindings.

Scott K

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Re: [ANN] PyYAML-3.06: YAML parser and emitter for Python

Hi Scott,

sklist@... wrote:
> ...
>> * Building LibYAML bindings no longer requires Pyrex installed.
> ...
> 
> I'm wondering if there is any benifit to dropping/retaining Pyrex as a 
> build dependency in the Debian package?  What's difference if I build 
> with/without it?  

The Pyrex dependency was dropped because the tgz is now shipped with a 
pregenerated _yaml.c file.  Therefore there's no need for users to run 
Pyrex to compile _yaml.pyx into _yaml.c.  You may still rebuild _yaml.c, 
if you have Pyrex installed, if you pass the --force option to the 
build_ext command.  Whether or not you need to do it for the Debian 
package, I'm not sure.  I would probably prefer if you keep the 
pregenerated _yaml.c because it would mean everybody uses the same code 
and I would not have to be hunting for bugs which may be introduced by 
different versions of Pyrex.  FYI, _yaml.c in .tgz was built with 
Pyrex-0.9.8.5 while there is some bug in the previous version of Pyrex, 
0.9.8.4, which prevents it from building _yaml.c.

Thanks,
Kirill

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PyYAML: YAMLObject subclasses are ignored

I suspect the solution to my problem is something really trivial.

I wrote a module called pitz that contains a class Issue:

    >>> pitz.Issue.yaml_tag
    u'ditz.rubyforge.org,2008-03-06/issue'

Then I try to load a document with that same tag, but I get a
ConstructorError:

    ConstructorError: could not determine a constructor for the tag
    '!ditz.rubyforge.org,2008-03-06/issue'

I think there's some namespace/scoping problem, because when I define
the same class in my interpreter and then run yaml.load(issue_file),
everything works OK.

So, how do I tell yaml to build pitz.Issue instances when it runs across
that tag?

Do I need to use add_constructor?  If so, I'd *really* appreciate some
example usage.

Thanks!

Matt

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Re: PyYAML: YAMLObject subclasses are ignored

On Sat 11 Oct 2008 11:12:31 AM EDT, Matthew Wilson wrote:
> I suspect the solution to my problem is something really trivial.
>
> I wrote a module called pitz that contains a class Issue:
>
>     >>> pitz.Issue.yaml_tag
>     u'ditz.rubyforge.org,2008-03-06/issue'
>
> Then I try to load a document with that same tag, but I get a
> ConstructorError:
>
>     ConstructorError: could not determine a constructor for the tag
>     '!ditz.rubyforge.org,2008-03-06/issue'
>

I figured out my problem.  I forgot the "!" character in front of my
yaml_tag attribute.  Whoops!

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Re: Rx, a schema system that can handle YAML

On Aug 30, 11:15 pm, Ricardo SIGNES <y...@...> wrote:
> It's time for me to clean the guinea pig cage and go to bed, so I'll be brief.
> I'm happy enough with the design and implementation of my Rx schema system to
> start talking about it more.
>
>  http://rjbs.manxome.org/rubric/entry/1670
>
> It's a simple system for writing schemata to validate data across platforms.
> In other words, it's great for using at both ends of web service interactions.
> It's designed to work with only the features that JSON provides, but that means
> it works well with YAML as well.

Nice work.

FYI: there's also Kwalify:

  http://redhanded.hobix.com/inspect/kwalifyIsYamlSchemastuffs.html

T.

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typos in YAML 1.1 examples

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