Add support for transform graph objects

[etpinard]

plotly.js v1.18.0 now ships with filter and groupby transforms. Transforms are a new plotly.js abstractions - they are incompatible with the current plotly.py plot-schema-to-graph-object logic.

In brief, any trace can now include a "transforms" list where each item is a dict with attributes. See example in js: http://codepen.io/etpinard/pen/dpKLpq

cc @Kully @theengineear @chriddyp

[theengineear]

@etpinard , I know that there's been some back and forth on the current transforms implementation. Should we hold off on adding this to plotly.py or go ahead with it?

[etpinard]

Should we hold off on adding this to plotly.py or go ahead with it?

I'd vote for holding off.

[flying-sheep]

I’m confused: there’s this example:

https://plot.ly/python/group-by/

but it sets validate=False. does this mean it’s an experimental implementation?

[gvwilson]

Hi - this issue has been sitting for a while, so as part of our effort to tidy up our public repositories I'm going to close it. If it's still a concern, we'd be grateful if you could open a new issue (with a short reproducible example if appropriate) so that we can add it to our stack. Cheers - @gvwilson