Ma Lin <malin...@163.com> added the comment:
This bug was fixed in Python 3.7, see issue32308.
Python 3.6.8 (tags/v3.6.8:3c6b436a57, Dec 23 2018, 23:31:17) [MSC v.1916 32 bit
(Intel)] on win32
>>> re.compile('(?m)(?P<trailing_ws>[
>>> \t]+\r*$)|(?P<no_final_newline>(?<=[^\n])\Z)').subn(lambda m:next('<'+k+'>'
>>> for k,v in m.groupdict().items() if v is not None), 'foobar ')
('foobar<trailing_ws>', 1)
Python 3.7.3rc1 (tags/v3.7.3rc1:69785b2127, Mar 12 2019, 22:37:55) [MSC v.1916
64 bit (AMD64)] on win32
>>> re.compile('(?m)(?P<trailing_ws>[
>>> \t]+\r*$)|(?P<no_final_newline>(?<=[^\n])\Z)').subn(lambda m:next('<'+k+'>'
>>> for k,v in m.groupdict().items() if v is not None), 'foobar ')
('foobar<trailing_ws><no_final_newline>', 2)
----------
nosy: +Ma Lin
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue10328>
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