[pypy-dev] [mdione at grulic.org.ar: modifying locals]

[Marcos Dione]

On Thu, Oct 15, 2015 at 04:47:57PM +0200, Marcos Dione wrote:
> On Thu, Oct 15, 2015 at 04:14:02PM +0200, Armin Rigo wrote:
> > Hi Marcos,
> > 
> > On Wed, Oct 14, 2015 at 12:58 PM, Marcos Dione <mdione at grulic.org.ar> wrote:
> > > inception_locals= sys._getframe().f_back.f_locals
> > > inception_locals.update (locals)
> > 
> > I think this works if you *assign* to f_locals.  When you only *read*
> > f_locals, you get a copy of the dict.  The assignment is needed to
> > write the new values back into the frame's real ("optimized") locals:
> > 
> >     inception_locals= sys._getframe().f_back.f_locals
> >     inception_locals.update (locals)
> >     sys._getframe().f_back.f_locals = inception_locals
> 
> AttributeError: attribute 'f_locals' of 'frame' objects is not writable
> 
>     so no cigar here. on the other hand, this works:
> 
> http://mike.verdone.ca/media/Dangerously%20Advanced%20Python.pdf [p21]
> 
>     so I'll keep investigating :-] 

    maybe context managers add a stack frame/do something with them
internally?

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