__loader__ for this test to succeed without a major changes. It also
doesn't test the original issue of modules imported by Py_Initialize()
having __loader__ set (the rest of the test covers that).
scratch. This means they do not set __loader__ by default. This is
acceptable under importlib/PEP 302 definitions, so relax the test that
was trying to apply this universally.
importlib.machinery.FileFinder when the directory has become
unreadable or a file. This brings semantics in line with Python 3.2
import.
Reported and diagnosed by David Pritchard.
fromlist of __import__ propagate.
The problem previously was that if something listed in fromlist didn't
exist then that's okay. The fix for that was too broad in terms of
catching ImportError.
The trick with the solution to this issue is that the proper
refactoring of import thanks to importlib doesn't allow for a way to
distinguish (portably) between an ImportError because finders couldn't
find a loader, or a loader raised the exception. In Python 3.4 the
hope is to introduce a new exception (e.g. ModuleNotFound) to make it
clean to differentiate why ImportError was raised.
state of the import system. Also make importlib.invalidate_caches()
work with sys.meta_path instead of sys.path_importer_cache to
completely separate the path-based import system from the overall
import system.
Patch by Eric Snow.
Ezio Melotti
Brett Cannon
Serhiy Storchaka
Barry Warsaw
Antoine Pitrou
Nick Coghlan