bpo-27494: Fix 2to3 handling of trailing comma after a generator expression#3771
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…ession While this is a valid Python 2 and Python 3 syntax lib2to3 would choke on it: set(x for x in [],) This patch changes the grammar definition used by lib2to3 so that the actual Python syntax is supported now and backwards compatibility is preserved.
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jstasiak commented Oct 4, 2017
@ambv or @benjaminp may I ask for a review? If there's a more appropriate review I'd appreciate an information. |
ContributorAuthor
jstasiak commented Oct 5, 2017
Thanks! |
serhiy-storchaka added a commit to serhiy-storchaka/cpython that referenced this pull request Jul 11, 2018
… generator expression (python#3771)" This reverts commit af810b3.
miss-islington pushed a commit to miss-islington/cpython that referenced this pull request Jul 31, 2018
… generator expression (pythonGH-3771)" (pythonGH-8241) This reverts commit af810b3. This is not valid syntax (see bpo-32012). (cherry picked from commit 4b8a7f5) Co-authored-by: Serhiy Storchaka <[email protected]>
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While this is a valid Python 2 and Python 3 syntax lib2to3 would choke
on it:
This patch changes the grammar definition used by lib2to3 so that the
actual Python syntax is supported now and backwards compatibility is
preserved.
https://bugs.python.org/issue27494
Note: there are some issues with the build of the first pull request I created (#60) to merge this change so this is a replacement pull request I create, hoping it'll fix things.