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authorBrett Cannon <brett@python.org>2013-06-12 20:59:46 (GMT)
committerBrett Cannon <brett@python.org>2013-06-12 20:59:46 (GMT)
commitb1611e2772af2c6eb73a6b3d04b3dbb43308fa6c (patch)
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Issue #15767: Introduce ModuleNotFoundError, a subclass of
ImportError. The exception is raised by import when a module could not be found. Technically this is defined as no viable loader could be found for the specified module. This includes ``from ... import`` statements so that the module usage is consistent for all situations where import couldn't find what was requested. This should allow for the common idiom of:: try: import something except ImportError: pass to be updated to using ModuleNotFoundError and not accidentally mask ImportError messages that should propagate (e.g. issues with a loader). This work was driven by the fact that the ``from ... import`` statement needed to be able to tell the difference between an ImportError that simply couldn't find a module (and thus silence the exception so that ceval can raise it) and an ImportError that represented an actual problem.
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@@ -10,6 +10,9 @@ What's New in Python 3.4.0 Alpha 1?
Core and Builtins
-----------------
+- Issue #15767: Introduce ModuleNotFoundError which is raised when a module
+ could not be found.
+
- Issue #18183: Fix various unicode operations on strings with large unicode
codepoints.