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From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: Should non-security 2.7 bugs be fixed?
Date: Sun, 19 Jul 2015 05:11:25 -0400
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On 7/18/2015 11:52 PM, Rustom Mody wrote:
among other things, a complaint about rejection of his desire for a 
mechanism for subsetting Python for teaching purposes.

Response 2: Core python is the most conservatively maintained part of 
Python.  Trying to change it radically, as distributed by PSF, is 
practically asking for rejection.  For subsetting, I suggest a different 
tack: filtering input before sending it to python and raise if it 
contains forbidden code.

After Response 1, I posted on the Devanagari thread a similar 
suggestion. I also posted an idea for implementing the idea by extending 
the internal reach of Idle extensions.  I limited the idea to the 
interactive shell because I could not immediately think of a use for 
filtering code before compiling.  Then I thought of this issue.  Among 
other things, code could be tokenized or parsed to an ast for filtering.

-- 
Terry Jan Reedy