[Python-ideas] Move more parts of interpreter core to stdlib

[Ned Batchelder]

On 8/26/13 1:55 PM, Antoine Pitrou wrote:
> On Mon, 26 Aug 2013 16:36:53 +0200
> Draic Kin <drekin at gmail.com> wrote:
>> Hello, it would be nice if reference pure Python implementation existed for
>> more parts of interpreter core and the core actually used them. This was
>> done for import machinery in Python 3.3 making importlib library.
>>
>> One potential target for this would be moving the logic of what python.exe
>> does – parsing its arguments, finding the script to run, compiling its code
>> and running as __main__ module, running REPL if it's in interactive mode
>> afterwards. There could be a stdlib module exposing this logic, using
>> argparse to parse the arguments, overhauled version of runpy to run the
>> __main__ module and overhauled version of code to run the REPL. Python.exe
>> would be just thin wrapper which bootstraps the interpreter and runs this
>> runner module.
> The interpreter needs a lot of information to be bootstrapped; you are
> proposing that the code which extracts that information be run *after*
> the interpreter is bootstrapped, which creates a nasty temporal problem.
>
> In the end, it may make maintenance *more* difficult, rather than less,
> to rewrite that code in Python.
It seems to me that this argument could have been made against the 
import rewrite in Python.  I don't know enough about the various factors 
to know what the differences are between the two scenarios (import and 
startup) to know whether it's a valid argument here or not. Can someone 
elaborate?

I know it would be great to have the startup logic more accessible.

--Ned.
>
> Regards
>
> Antoine.
>
>
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