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[3.12] GH-109190: Copyedit 3.12 What's New: Improved Error Messages (GH-109654) #109687

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Sep 22, 2023
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[3.12] GH-109190: Copyedit 3.12 What's New: Improved Error Messages (GH-109654) #109687

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11 changes: 5 additions & 6 deletions Doc/whatsnew/3.12.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -99,7 +99,7 @@ Improved Error Messages

* Modules from the standard library are now potentially suggested as part of
the error messages displayed by the interpreter when a :exc:`NameError` is
raised to the top level. Contributed by Pablo Galindo in :gh:`98254`.
raised to the top level. (Contributed by Pablo Galindo in :gh:`98254`.)

>>> sys.version_info
Traceback (most recent call last):
Expand All @@ -110,25 +110,24 @@ Improved Error Messages
Now if a :exc:`NameError` is raised in a method and the instance has an
attribute that's exactly equal to the name in the exception, the suggestion
will include ``self.<NAME>`` instead of the closest match in the method
scope. Contributed by Pablo Galindo in :gh:`99139`.
scope. (Contributed by Pablo Galindo in :gh:`99139`.)

>>> class A:
... def __init__(self):
... self.blech = 1
...
... def foo(self):
... somethin = blech

...
>>> A().foo()
Traceback (most recent call last):
File "<stdin>", line 1
somethin = blech
^^^^^
NameError: name 'blech' is not defined. Did you mean: 'self.blech'?


* Improve the :exc:`SyntaxError` error message when the user types ``import x
from y`` instead of ``from y import x``. Contributed by Pablo Galindo in :gh:`98931`.
from y`` instead of ``from y import x``. (Contributed by Pablo Galindo in :gh:`98931`.)

>>> import a.y.z from b.y.z
Traceback (most recent call last):
Expand All @@ -139,7 +138,7 @@ Improved Error Messages

* :exc:`ImportError` exceptions raised from failed ``from <module> import
<name>`` statements now include suggestions for the value of ``<name>`` based on the
available names in ``<module>``. Contributed by Pablo Galindo in :gh:`91058`.
available names in ``<module>``. (Contributed by Pablo Galindo in :gh:`91058`.)

>>> from collections import chainmap
Traceback (most recent call last):
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