Mark, your tone is no longer constructive and is hurting your case in arguing for anything. Please take it down a notch.
On Tue Dec 16 2014 at 1:48:59 PM Mark Roberts <wiz...@gmail.com> wrote: > On Tue, Dec 16, 2014 at 2:45 AM, Antoine Pitrou <solip...@pitrou.net> > wrote: >> >> Iterating accross a dictionary doesn't need compatibility shims. It's >> dead simple in all Python versions: >> >> $ python2 >> Python 2.7.8 (default, Oct 20 2014, 15:05:19) >> [GCC 4.9.1] on linux2 >> Type "help", "copyright", "credits" or "license" for more information. >> >>> d = {'a': 1} >> >>> for k in d: print(k) >> ... >> a >> >> $ python3 >> Python 3.4.2 (default, Oct 8 2014, 13:08:17) >> [GCC 4.9.1] on linux >> Type "help", "copyright", "credits" or "license" for more information. >> >>> d = {'a': 1} >> >>> for k in d: print(k) >> ... >> a >> >> Besides, using iteritems() and friends is generally a premature >> optimization, unless you know you'll have very large containers. >> Creating a list is cheap. >> > > It seems to me that every time I hear this, the author is basically > admitting that Python is a toy language not meant for "serious computing" > (where serious is defined in extremely modest terms). The advice is also > very contradictory to literally every talk on performant Python that I've > seen at PyCon or PyData or ... well, anywhere. And really, doesn't it > strike you as incredibly presumptuous to call the *DEFAULT BEHAVIOR* of > Python 3 a "premature optimization"? Isn't the whole reason that the > default behavior switch was made is because creating lists willy nilly all > over the place really *ISN'T* cheap? This isn't the first time someone has > tried to run this line past me, but it's the first time I've been fed up > enough with the topic to call it complete BS on the spot. Please help me > stop the community at large from saying this, because it really isn't true > at all. > > -Mark > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: https://mail.python.org/mailman/options/python-dev/ > brett%40python.org >
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