Matthias Bussonnier added the comment:

Hi Carol, 

> Matthias, Did you wish to mark this issue for additional Documentation and as 
> a behavior change request (warning of signature change until 3.6) in addition 
> to Devguide?

Hum, probably, I'm not super familiar with this bug tracker and it use, I've 
tried to select both Devguide and Docs now.

> a) Should `ast` shim the old signature and raise a warning until 3.6?

>From Guido's comment on linked issue, I guess not: 

> "There is no compatibility guarantee for the ast module"


> b) What additional items should be added to Documentation or Porting Guide?

I guess that Call api changed in the what's new. A link to a rough 
implementation that show how to get code compatible on 3.5 and below would be 
nice, it is kind of painful to iterate through the new AST structure and figure 
things out.

> c) What items should be added to Devguide?

I can talk to Thomas Kluyver tomorrow about merging green tree snake into the 
devguide, or maybe into ast docs. Would that be useful/more acceptable than 
linking to external docs ?

Thanks.

----------
assignee:  -> docs@python
components: +Documentation
nosy: +docs@python

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