[issue19697] refactor pythonrun.c to make use of specs (__main__.__spec__)

[Eric Snow]

Eric Snow added the comment:

Food for thought:

We could (for 3.5) add an importer just for __main__ that gives us the appropriate spec and loads __main__ accordingly.  Such a loader could even incorporate exec of the site module (and any PYTHONSTARTUP script).

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19697>
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