Dino Viehland 9b6fec4651 bpo-39336: Allow packages to not let their child modules be set on them (#18006) ... * bpo-39336: Allow setattr to fail on modules which aren't assignable When attaching a child module to a package if the object in sys.modules raises an AttributeError (e.g. because it is immutable) it causes the whole import to fail. This now allows immutable packages to exist and an ImportWarning is reported and the AttributeError exception is ignored.		2020-01-22 16:42:38 -08:00
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circular_imports	bpo-20490: Improve circular import error message (GH-15308)	2019-09-09 08:17:50 -07:00
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unwritable	bpo-39336: Allow packages to not let their child modules be set on them (#18006)	2020-01-22 16:42:38 -08:00