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bpo-42179: Clarify exception chaining #23160

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Merged
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Dec 16, 2020
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bpo-42179: Clarify exception chaining #23160

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86fe587
Update errors.rst
greatvovan Nov 5, 2020
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Merge branch 'master' into bugfix/bpo-42179
greatvovan Nov 6, 2020
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greatvovan Nov 9, 2020
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8 changes: 4 additions & 4 deletions Doc/tutorial/errors.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -281,17 +281,17 @@ chaining exceptions. For example::
This can be useful when you are transforming exceptions. For example::

>>> def func():
... raise IOError
... raise ConnectionError
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Nice! One OSError was missed on line 294

...
>>> try:
... func()
... except IOError as exc:
... except ConnectionError as exc:
... raise RuntimeError('Failed to open database') from exc
...
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
File "<stdin>", line 2, in func
OSError
ConnectionError
<BLANKLINE>
The above exception was the direct cause of the following exception:
<BLANKLINE>
Expand All @@ -300,7 +300,7 @@ This can be useful when you are transforming exceptions. For example::
RuntimeError: Failed to open database

Exception chaining happens automatically when an exception is raised inside an
:keyword:`except` or :keyword:`finally` section. Exception chaining can be
:keyword:`except` or :keyword:`finally` section. This can be
disabled by using ``from None`` idiom:

>>> try:
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