[issue14657] Avoid two importlib copies

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

The other advantage of splitting the entry points is that we can tweak Brett's plan to make the import machinery explicit such that it happens in a separate function that's only called from __init__.py.

That way the published hooks will always be from the on-disk implementation and never from the frozen one.

If you're after the ability to emit debugging messages in a way that doesn't cause fatal errors during system startup, the only way I can see is to have a "do nothing" module level display function in _bootstrap.py that is later replaced with a reference to builtins.print:

  def _debug(*args, **kwds):
      pass

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<http://bugs.python.org/issue14657>
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