[issue19944] Make importlib.find_spec load packages as needed

[Eric Snow]

Eric Snow added the comment:

Here's an update to the patch.  It includes doc and test changes.  It also moves find_spec() into importlib.util.

(I'm removing the other patches since I don't consider them valid approaches any longer).

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Added file: http://bugs.python.org/file33336/issue19944-find-spec-mirror-import-module-direct.diff

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