...and, if so, why lambda's?(: Without backward compatibility point I see that they are getting "unofficially" deprecated and their usage is dishonoured.
-- ,,,^..^,,, On Thu, Aug 1, 2013 at 6:53 PM, Ronald Oussoren <ronaldousso...@mac.com> wrote: > > On 1 Aug, 2013, at 16:48, Alexander Shorin <kxe...@gmail.com> wrote: > >> Hi Ronald, >> >> I understand this, but I'm a bit confused about fate of lambdas with >> such guideline since I see no more reasons to use them with p.9 >> statement: long lines, code duplicate, no mock and well tests etc. - >> all these problems could be solved with assigning lambda to some name, >> but now they are looks useless (or useful only for very trivial cases) > > That sounds about right :-) > > Note that: > > f = lambda x: x ** 2 > > And: > > def f(x): return x ** 2 > > Are functionally equivalent and use the same byte code. The only differences > are that the lambda saves two characters in typing, and the "def" variant has > a more useful value in its __name__ attribute. > > IMHO The lambda variant also looks uglier (even with the def variant on a > single line). > > Ronald > >> -- >> ,,,^..^,,, >> >> >> On Thu, Aug 1, 2013 at 6:41 PM, Ronald Oussoren <ronaldousso...@mac.com> >> wrote: >>> >>> On 1 Aug, 2013, at 16:34, Alexander Shorin <kxe...@gmail.com> wrote: >>> >>>> Hi Nick, >>>> >>>> On Thu, Aug 1, 2013 at 4:44 PM, Nick Coghlan <ncogh...@gmail.com> wrote: >>>>> 9. Explicit guideline not to assign lambdas to names (use def, that's >>>>> what it's for) >>>> >>>> Even for propose to fit chars-per-line limit and/or to remove >>>> duplicates (especially for sorted groupby case)? >>> >>> When you do "name = lambda ..." you've created a named function, when you >>> do that your better of using def statement for the reasons Nick mentioned >>> in the PEP. >>> >>> Ronald >>> >>>> >>>> -- >>>> ,,,^..^,,, >>>> _______________________________________________ >>>> Python-Dev mailing list >>>> Python-Dev@python.org >>>> http://mail.python.org/mailman/listinfo/python-dev >>>> Unsubscribe: >>>> http://mail.python.org/mailman/options/python-dev/ronaldoussoren%40mac.com >>> > _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
