Hey folks, I hope this is the right list for this sort of thing (python-ideas seemed more far-fetched).
For some context: there is currently a issue with pex that causes sys.modules lookups to stop working for __main__. In turns this makes unittest.run() & pkg_resources.resource_* fail. The root cause is that pex uses runpy.run_module with alter_sys=False. The fix should be to just pass alter_sys=True, but that changes sys.argv[0] and various existing pex files depend on that being the pex file. You can read more at https://github.com/pantsbuild/pex/pull/211 . Conservatively, I'd like to propose adding an argument to disable this behavior. The current behavior breaks a somewhat reasonable invariant that you can restart your program via `os.execv([sys.executable] + sys.argv)`. Moreover it might be user-friendly to add a `argv=sys.argv[1:]` argument to set & restore the full arguments to the module, where `argv=None` disables argv[0] switching. What do you think? Mike.
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