[issue19944] Make importlib.find_spec load packages as needed

[Brett Cannon]

Brett Cannon added the comment:

Another option would be to add a keyword-only use_parent_path flag to importlib.find_spec() which is True by default. If use_parent is True, 'path' is provided, and there is no parent, then 'path' can act as a fallback.

Which makes me wonder if also adding a keyword-only import_parents keyword to implicitly import any parent packages as necessary would be helpful. It would imply use_parent_path as true. Might also be useful to add to import_module() to get rid of that annoyance inherited from __import__.

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nosy: +brett.cannon

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<http://bugs.python.org/issue19944>
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