On Mar 23, 2011, at 1:30 PM, Mateusz Paprocki wrote: > Hi, > > On 23 March 2011 07:31, VPeric <[email protected]> wrote: > Hello, > > I'm a student at the Faculty of Electrical Engineering, Czech > Technical University in Prague. I'm studying Open Informatics, which > is a study program orientated towards research and the utilization of > new technologies. > > While I have experience with several languages (notably C, Java, > Prolog), Python is by far my favorite language. I find the issues > related to conversion to Python 3 particularly interesting, and would > like to work on porting SymPy to Python 3. The porting is inevitable > if SymPy is to survive, and doing it sooner rather than later offers > advantages that could be helpful in increased adoption (and hence > increased development), so I consider it a very worthwhile pursuit. > > My main problem is whether this is simply "big enough" for a GSoC > project? While it is listed on the Ideas page, after a cursory glance > at the code I don't see any major problems here (or I simply missed > them, of course). I have read about the last time such a conversion > was attempted and the problems encountered, but as that was over 18 > months ago, I believe most of those problems can be solved now. > > It's a good question whether this is "big enough". Surely it's important > enough to consider this as a GSoC project. I think that the biggest problem > currently (unless I forgot about something else) are __cmp__ methods. We are > gradually taking care of this issue across SymPy but there is still a lot of > work to be done in this area. It's up to you to recognize issues that have to > be fixed and figure out a schedule you would like to follow (don't hesitate > to ask, because we already made some effort to make SymPy compatible with > Python 3 and we have some code in development branches that could help you). > If it happens that there is not enough work in porting SymPy to Python 3, > then you might consider widening the project and make SymPy run in a subset > of Jython, PyPy, IronPython, etc. (I don't remember which are already > supported).
That is also a good idea. From what I remember, that are test failures in most of these (basically because we take advantage of some feature of Python which is actually just an implementation detail from CPython). And if you set up a build system, you could also add these to it. By the way, I thought the main __cmp__ problem was the _compare_pretty function, which you have replaced in your polys12 branch. Is there some other that still remains? Aaron Meurer > > > My plan would be to first run in 2.6 with no errors (ie. "Python -3"), > which shouldn't be too difficult (around 150 errors, most of which > look trivial), and then try to maintain a dual codebase with automatic > running of the 2to3 tool when building for Python3 (which is the > recommended procedure). Problems might arise from the fact that SymPy > currently supports Python 2.4 or higher, but this would have to be > solved as it comes up. I hope it will be possible to keep supporting > 2.4, though limiting it to 2.6 would likely result in cleaner code. > > Thank you for your time, > Vladimir Perić > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/sympy?hl=en. > > > Mateusz > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/sympy?hl=en. -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
