Re: [Cython] Possible bug when using cython -Wextra
On 14 February 2013 05:08, Robert Bradshaw wrote: > On Thu, Feb 7, 2013 at 10:05 AM, Stefan Behnel wrote: >> Samuele Kaplun, 07.02.2013 13:00: >>> In data giovedì 7 febbraio 2013 12:11:47, Stefan Behnel ha scritto: > [...] > > def test(): > cdef int i > > for i from 0 <= i < 10: > print "foo" > > [...] Yes, it actually is an unused variable in your code. There is no reference to it, only assignments. >>> >>> mmh. But is it used albeit indirectly. Then what pattern would you suggest >>> in >>> this case (i.e. to repeat a certain body a given number of times), in order >>> to >>> avoid such warning? >> >> The normal thing to do in Python would be to use an underscore (i.e. "_") >> as variable name. I don't think we currently special case that pattern, >> though. Maybe we should. > > I agree. Done. > >> Or maybe we should just drop the "unused variable" warning for loop >> variables as they actually do something and serve a purpose, even if they >> are never referenced. > > +1 to this too. (Not yet done.) Yeah, I think that's the sanest thing. I already implemented this in Numba which bases its control flow on Cython's (because it's awesome, thanks to Vitja :)). It simply adds a flag to NameAssignment which is set for the ForNode's target variable. > - Robert > ___ > cython-devel mailing list > cython-devel@python.org > http://mail.python.org/mailman/listinfo/cython-devel ___ cython-devel mailing list cython-devel@python.org http://mail.python.org/mailman/listinfo/cython-devel
[Cython] Fwd: A new webpage promoting Compiler technology for CPython
This just came through python-dev: Original-Message Subject: A new webpage promoting Compiler technology for CPython Date: Fri, 15 Feb 2013 01:11:12 -0600 From: Travis Oliphant Hey all, With Numba and Blaze we have been doing a lot of work on what essentially is compiler technology and realizing more and more that we are treading on ground that has been plowed before with many other projects. So, we wanted to create a web-site and perhaps even a mailing list or forum where people could coordinate and communicate about compiler projects, compiler tools, and ways to share efforts and ideas. The website is: http://compilers.pydata.org/ This page is specifically for Compiler projects that either integrate with or work directly with the CPython run-time which is why PyPy is not presently listed. The PyPy project is a great project but we just felt that we wanted to explicitly create a collection of links to compilation projects that are accessible from CPython which are likely less well known. But that is just where we started from. The website is intended to be a community website constructed from a github repository. So, we welcome pull requests from anyone who would like to see the website updated to reflect their related project.Jon Riehl (Mython, PyFront, ROFL, and many other interesting projects) and Stephen Diehl (Blaze) and I will be moderating the pull requests to begin with. But, we welcome others with similar interests to participate in that effort of moderation. The github repository is here: https://github.com/pydata/compilers-webpage This is intended to be a community website for information spreading, and so we welcome any and all contributions. Thank you, Travis Oliphant ___ NumPy-Discussion mailing list numpy-discuss...@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion ___ cython-devel mailing list cython-devel@python.org http://mail.python.org/mailman/listinfo/cython-devel
