Author ncoghlan
Recipients Tim.Graham, abarry, brett.cannon, martin.panter, ncoghlan, ned.deily, r.david.murray, rhettinger, serhiy.storchaka, yan12125, yselivanov
Date 2016-09-16.02:05:57
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <1473991558.27.0.295122910967.issue28128@psf.upfronthosting.co.za>
In-reply-to
Content
I realised I wasn't entirely clear about the "warning misattribution" problem that's implied by Chi Hsuan's problem report, so here's the behaviour when using "-W all" rather than "-W error":

    $ echo "print('\d')" > bad_escape.py
    $ echo "import bad_escape" > escape_warning.py
    $ ./python -W all escape_warning.py 
    _frozen_importlib:205: DeprecationWarning: invalid escape sequence '\d'
    \d

That's a misattribution - the warning should be reported against the module being imported, not against the import system itself.

Compare that to the attribution of the old SyntaxWarning for assignments prior to a scope declaration:

    $ cat syntax_warning.py 
    def f():
        x = 1
        global x
    $ python3 -c "import syntax_warning" 
    /home/ncoghlan/devel/py36/syntax_warning.py:3: SyntaxWarning: name 'x' is assigned to before global declaration
      global x

(Run with 3.5, as that became a full SyntaxError for 3.6)
History
Date User Action Args
2016-09-16 02:05:58ncoghlansetrecipients: + ncoghlan, brett.cannon, rhettinger, ned.deily, r.david.murray, martin.panter, serhiy.storchaka, yselivanov, Tim.Graham, yan12125, abarry
2016-09-16 02:05:58ncoghlansetmessageid: <1473991558.27.0.295122910967.issue28128@psf.upfronthosting.co.za>
2016-09-16 02:05:58ncoghlanlinkissue28128 messages
2016-09-16 02:05:57ncoghlancreate