Re: PyYAML - Help with redefining to_yaml and multiple documents

Thanks for your reply, Kirill.  I guess what I am really looking for is a
more detailed example of subclassing YAMLObject than what is available in
the docs, to get a better idea of what I can do there.

Thanks,
Sean

On Tue, Mar 16, 2010 at 12:08 PM, Kirill Simonov <[email protected]> wrote:

> Sean wrote:
>
>
>>
>>    I have a simple python class containing 2 dicts.  I'd like to
>>    represent an instance of the class as two yaml documents, with the ---
>>    document start token separating the 2 dicts.  I think I need to
>>    redefine to_yaml to do this, but I'm not really sure how to get both
>>    documents into the stream.
>>
>>    import yaml
>>    class Info(yaml.YAMLObject):
>>       yaml_tag = u'Info'
>>       def __init__(self):
>>           self.firstDoc={1: 'one', 2: 'two', 3: 'three'}
>>           self.secondDoc={4: 'four', 5: 'five'}
>>
>>       @classmethod
>>       def to_yaml(cls,dumper,data):
>>           return dumper.represent_mapping(tag=u'tag:yaml.org
>>    <http://yaml.org>,
>>
>>    2002:map',mapping=data.firstDoc)
>>
>>    if __name__ == "__main__":
>>       print yaml.dump(Info(),default_flow_style=False)
>>
>>
> You don't need to inherit your class from YAMLObject to do that. Just call
> yaml.dump_all() and pass it a list of the dictionaries:
>
> info = Info()
> print yaml.dump_all([info.firstDoc, info.secondDoc],
> default_flow_style=False)
>
>
>
> Thanks,
> Kirill
>

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