[issue17188] Document 'from None' in raise statement doc.

2017-05-30 Thread Mariatta Wijaya 

Mariatta Wijaya added the comment:

Thanks Serhiy.
I added the missing periods.

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[issue17188] Document 'from None' in raise statement doc.

2017-05-30 Thread Mariatta Wijaya 

Mariatta Wijaya added the comment:


New changeset 60b257b01ca497d7a556e3f526704aa1b923d1ac by Mariatta in branch 
'3.6':
bpo-17188: add missing periods at the end of sentences (GH-1875) (GH-1876)
https://github.com/python/cpython/commit/60b257b01ca497d7a556e3f526704aa1b923d1ac


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[issue17188] Document 'from None' in raise statement doc.

2017-05-30 Thread Mariatta Wijaya 

Changes by Mariatta Wijaya :


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[issue17188] Document 'from None' in raise statement doc.

2017-05-30 Thread Mariatta Wijaya 

Mariatta Wijaya added the comment:


New changeset 9efad1e5aef32a6d8ca288793e8ee6df8782f615 by Mariatta in branch 
'master':
bpo-17188: add missing periods at the end of sentences (GH-1875)
https://github.com/python/cpython/commit/9efad1e5aef32a6d8ca288793e8ee6df8782f615


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[issue17188] Document 'from None' in raise statement doc.

2017-05-30 Thread Mariatta Wijaya 

Changes by Mariatta Wijaya :


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[issue17188] Document 'from None' in raise statement doc.

2017-05-30 Thread Serhiy Storchaka 

Serhiy Storchaka added the comment:

Seems periods at the ends of sentences are missed.

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[issue17188] Document 'from None' in raise statement doc.

2017-05-30 Thread Mariatta Wijaya 

Mariatta Wijaya added the comment:

Patch has been applied to 3.7 and 3.6.
Thanks everyone :)

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[issue17188] Document 'from None' in raise statement doc.

2017-05-30 Thread Mariatta Wijaya 

Mariatta Wijaya added the comment:


New changeset 00b381b9a7b6b15350d1dcf7c688bf808cbf0ebb by Mariatta (csabella) 
in branch '3.6':
bpo-17188: DOC: Document 'from None' in raise statement (GH-1671) (GH-1867)
https://github.com/python/cpython/commit/00b381b9a7b6b15350d1dcf7c688bf808cbf0ebb


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[issue17188] Document 'from None' in raise statement doc.

2017-05-30 Thread Cheryl Sabella 

Changes by Cheryl Sabella :


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[issue17188] Document 'from None' in raise statement doc.

2017-05-20 Thread Terry J. Reedy 

Terry J. Reedy added the comment:

The double listing seems to be a glitch.

Either someone else does backport or online doc change waits until I can do it.

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[issue17188] Document 'from None' in raise statement doc.

2017-05-20 Thread Terry J. Reedy 

Terry J. Reedy added the comment:


New changeset 763557eac06ba60d7c5133e4f80df8870d8f917e by terryjreedy 
(csabella) in branch 'master':
bpo-17188: DOC: Document 'from None' in raise statement (#1671)
https://github.com/python/cpython/commit/763557eac06ba60d7c5133e4f80df8870d8f917e


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[issue17188] Document 'from None' in raise statement doc.

2017-05-19 Thread Cheryl Sabella 

Changes by Cheryl Sabella :


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[issue17188] Document 'from None' in raise statement doc.

2017-05-19 Thread Cheryl Sabella 

Changes by Cheryl Sabella :


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[issue17188] Document 'from None' in raise statement doc.

2017-05-10 Thread Cheryl Sabella 

Cheryl Sabella added the comment:

Would any of the original authors be able to prepare a PR for this?  Thanks.

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[issue17188] Document 'from None' in raise statement doc.

2016-10-05 Thread Mariatta Wijaya 

Mariatta Wijaya added the comment:

reuploaded thomir's patch issue17188_3.4.patch as is.
I take no credit for this.

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[issue17188] Document 'from None' in raise statement doc.

2016-10-04 Thread Mariatta Wijaya 

Changes by Mariatta Wijaya :


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[issue17188] Document 'from None' in raise statement doc.

2016-09-22 Thread Robert Collins 

Changes by Robert Collins :


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[issue17188] Document 'from None' in raise statement doc.

2016-09-13 Thread Petri Lehtinen 

Changes by Petri Lehtinen :


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[issue17188] Document 'from None' in raise statement doc.

2016-09-12 Thread Thomi Richards 

Thomi Richards added the comment:

Re-uploaded the patch without the typo.

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[issue17188] Document 'from None' in raise statement doc.

2016-09-12 Thread Thomi Richards 

Thomi Richards added the comment:

OK, it seems that patch applies cleanly to 3.5 and 3.6.

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[issue17188] Document 'from None' in raise statement doc.

2016-09-12 Thread Thomi Richards 

Thomi Richards added the comment:

I have attached a patch for 3.4, based on the patch submitted by Nitika 
Agarwal. The main difference is that I think it's better to be explicit and 
show a separate example of `raise X from None`.

I will submit a patch for later versions as well.

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Added file: http://bugs.python.org/file44607/issue17188_3.4.patch

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[issue17188] Document 'from None' in raise statement doc.

2015-01-30 Thread Berker Peksag 

Changes by Berker Peksag berker.pek...@gmail.com:


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versions: +Python 3.5 -Python 3.3

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[issue17188] Document 'from None' in raise statement doc.

2014-03-20 Thread Petri Lehtinen 

Petri Lehtinen added the comment:

The patch doesn't apply cleanly on 3.4 or default.

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[issue17188] Document 'from None' in raise statement doc.

2014-03-20 Thread Arfrever Frehtes Taifersar Arahesis 

Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com:


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[issue17188] Document 'from None' in raise statement doc.

2014-03-19 Thread Nitika Agarwal 

Nitika Agarwal added the comment:

Patch with some corrections.
Please review the patch attached.

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Added file: http://bugs.python.org/file34527/issue17188_1.patch

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[issue17188] Document 'from None' in raise statement doc.

2014-03-15 Thread Nitika Agarwal 

Changes by Nitika Agarwal nitikaagarwa...@gmail.com:


Removed file: http://bugs.python.org/file34431/issue17188.patch

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[issue17188] Document 'from None' in raise statement doc.

2014-03-15 Thread Nitika Agarwal 

Changes by Nitika Agarwal nitikaagarwa...@gmail.com:


Added file: http://bugs.python.org/file34432/issue17188.patch

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[issue17188] Document 'from None' in raise statement doc.

2014-03-15 Thread Nitika Agarwal 

Changes by Nitika Agarwal nitikaagarwa...@gmail.com:


Removed file: http://bugs.python.org/file34432/issue17188.patch

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[issue17188] Document 'from None' in raise statement doc.

2014-03-15 Thread Nitika Agarwal 

Changes by Nitika Agarwal nitikaagarwa...@gmail.com:


Added file: http://bugs.python.org/file34434/issue17188.patch

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[issue17188] Document 'from None' in raise statement doc.

2014-03-14 Thread Nitika Agarwal 

Nitika Agarwal added the comment:

Hi,
As suggested by Petri,I have made some changes.
Please review the attached patch.Any comments and feedback are welcome.

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Added file: http://bugs.python.org/file34431/issue17188.patch

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[issue17188] Document 'from None' in raise statement doc.

2013-02-23 Thread Dennis Mårtensson 

Dennis Mårtensson added the comment:

We have added the from None to the documentation with a explanation and some 
example code.

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Added file: http://bugs.python.org/file29199/patch17188.patch

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[issue17188] Document 'from None' in raise statement doc.

2013-02-23 Thread Petri Lehtinen 

Petri Lehtinen added the comment:

The patch should add something to the The from clause is used for 
exception... paragraph, to state that None is also allowed.

It also adds things in a confusing order. I think the new example should go 
below other examples, and the changedversion and addedversion directives should 
be the last thing in the section.

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[issue17188] Document 'from None' in raise statement doc.

2013-02-15 Thread Ezio Melotti 

Changes by Ezio Melotti ezio.melo...@gmail.com:


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[issue17188] Document 'from None' in raise statement doc.

2013-02-15 Thread Nick Coghlan 

Nick Coghlan added the comment:

As Terry notes, the various pieces of from None documentation should also 
have a nearby directive like:

.. versionchanged: 3.3

   :const:`None` permitted as ``Y`` in ``raise X from Y`` 

.. versionadded: 3.3

   The ``__suppress_context__`` attribute to suppress automatic display of the 
exception context

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[issue17188] Document 'from None' in raise statement doc.

2013-02-11 Thread Terry J. Reedy 

New submission from Terry J. Reedy:

Language manual, section 7.8. The raise statement has no mention of the 'from 
None' option. Indeed it says if given, the second expression must be another 
exception class or instance, which would exclude None.

Library manual, Ch 5. Built-in Exceptions, says
'''
When raising a new exception (rather than using a bare raise to re-raise the 
exception currently being handled), the implicit exception context can be 
supplemented with an explicit cause by using from with raise:

raise new_exc from original_exc

The expression following from must be an exception or None. It will be set as 
__cause__ on the raised exception. Setting __cause__ also implicitly sets the 
__suppress_context__ attribute to True, so that using raise new_exc from None 
effectively replaces the old exception with the new one for display purposes 
(e.g. converting KeyError to AttributeError, while leaving the old exception 
available in __context__ for introspection when debugging.
'''
I am not sure how much should be copied over, but None should be at least 
mentioned and perhaps there should be a cross-reference.

I am also not sure how much applies to 3.2, but there is no version-added or 
-changed note with the above.

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stage: needs patch
status: open
title: Document 'from None' in raise statement doc.
versions: Python 3.2, Python 3.3, Python 3.4

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