Add unsafe flag

[tonyfast]

Could you provide an option to load python tags something like

%%yaml foo --unsafe
bar: baz

I am thinking this could be useful in the context of yaml manifests for data with plot representations.

[bollwyvl]

Another option would be to pass it a particular loader... that way you can configure it to do your own custom parsing without letting the whole of python be exposed... unless you intentionally pick yaml.Baseloader.

In the case of Bokeh, a custom loader would be nice:
http://pyyaml.org/wiki/PyYAMLDocumentation#Constructorsrepresentersresolvers

bokeh could then just be a URI namespace.

%%yaml foo Loader=BokehLoader
%TAG !bokeh! tag:bokeh.pydata.org,2015:/
plot: !bokeh!charts.line
    args:
    - y: [6, 7, 2, 4, 5]
      z: [1, 5, 12, 4, 2]
    kwds:
        title: simple line example 
        xlabel: x
        ylabel: values
        width: 400
        height: 400

The advantage here is one could imagine not being specifically tied to python for dereferencing, jsyaml supports such namespaced tags as well.

[tonyfast]

Yes that is a much more pleasing suggestion. The snippet above could emit a Bokeh plot and %%yaml foo Loader=BaseLoader could emit the data structure.

[bollwyvl]

Added --loader with #2, up on PyPi as 0.2.0!

[tonyfast]

Sickkk. Could you make a notebook with what a customer loader might look
like?

On 5:31PM, Sat, Aug 15, 2015 bollwyvl notifications@github.com wrote:

Added --loader with #2 #2, up
on PyPi as 0.2.0 https://pypi.python.org/pypi/yamlmagic/0.2.0!

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