Message217633
The -3 option should warn about str to bytes conversions and str to bytes comparisons:
For example in Python 3 the following happens:
python3
Python 3.3.2 <snip>
Type "help", "copyright", "credits" or "license" for more information.
>>> b"a" + "a"
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: can't concat bytes to str
>>> b"a" == "a"
False
>>>
But even python2 -3 does not warn about either of these uses:
python2 -3
Python 2.7.5 <snip>
Type "help", "copyright", "credits" or "license" for more information.
>>> b"a" + "a"
'aa'
>>> b"a" == "a"
True
>>> u"a" + "a"
u'aa'
>>> u"a" == "a"
True
>>>
These two issues are some of the more significant problems I have in trying get python2 code working with python3, and if -3 does not warn about it this is harder to do. |
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Date |
User |
Action |
Args |
2014-04-30 18:00:16 | Joshua.J.Cogliati | set | recipients:
+ Joshua.J.Cogliati, vstinner, ezio.melotti |
2014-04-30 18:00:16 | Joshua.J.Cogliati | set | messageid: <1398880816.89.0.350834147614.issue21401@psf.upfronthosting.co.za> |
2014-04-30 18:00:16 | Joshua.J.Cogliati | link | issue21401 messages |
2014-04-30 18:00:16 | Joshua.J.Cogliati | create | |
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