On Jan 30, 2012 5:12 AM, "Nathann Cohen" <nathann.co...@gmail.com> wrote: > > Hello everybody !!! > > I wondered why we still had .py files in our library. Some time ago > this made sense as there were Python features that were not available > in Cython -- like the yield keyword -- but now that they are, what is > the point ? I'm asking this because we have in the Graph classes which > are "copies" of each other, that is for instance a file > generic_graph.py and a generic_graph_pyx.pyx, whose purpose is obvious > : we want to be able to define some methods as Python ones, some > others as Cython ones. > > Well, what is the point of having .py files anymore when we could > easily rename them to .pyx without changing anything in them (first -- > is that even true or am I a bit optimistic ?) and be able to add some > Cython code inside when Python is so awfully slow ?
If you ever change a filebfrom Python to Cython for no clear good reason, I will be very annoyed. One should always use Python instead of Cython unless there is a clear compelling reason not to. Cython code... - takes a long time to compile - is much harder to interactively debug sunce you can't run python code in the stackframe's context (yet) - requires more knowledge for devs to use thus reducing the maintainability of sage - is not always faster than pure python - does not support 100% of Python language features - > Cython is good, Cython is beautiful, Cython is fast. Thanks to Cython > I can finally write Sage code which fails on weird architectures and > spend days fixing the bugs, which is way harder with plain Python. > > Thankssss for your thoughts ! :-) > > Nathann > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com > For more options, visit this group at http://groups.google.com/group/sage-devel > URL: http://www.sagemath.org -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
