On 27 April 2011 12:45, Bogdan Opanchuk <manti...@gmail.com> wrote: > Hello, > > I am using Cython 0.14.1 with Python 2.7.1 on OSX 10.6.7 > > The following code: > --- > cdef class Test: > @staticmethod > def func(): > print "Static method" > --- > gives error when being cythoned: "Method func has wrong number of > arguments (0 declared, 1 or more expected)" > > And if one adds some parameters to this method (like "def func(a, > b):"), cython crashes with exception: > --- > ... long stack trace ... > File > "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Cython-0.14-py2.7-macosx-10.6-intel.egg/Cython/Compiler/TypeSlots.py", > line 100, in fixed_arg_type > return self.format_map[self.fixed_arg_format[i]] > KeyError: 'T' > --- > > So, is there a way to create static methods in cdef classes? This > workaround seems to work, but it is a bit ugly: > --- > def func(a, b): > print "Static method" > > cdef class Test: > func = func > --- > > Best regards, > Bogdan > _______________________________________________ > cython-devel mailing list > cython-devel@python.org > http://mail.python.org/mailman/listinfo/cython-devel >
This issue has bugged my from the fist day I've started to use Cython. However, never got time to look for a fix. Moreover, I think using @classmethod is better than @staticmethod. @classmethod gives you some extra context (the class) that could be useful in the case of inheritance, specially if your method is a factory function. So, as a workaround, try to use @classmethod, from an API point of view they are very similar, and you can take advantage of @classmethod extra context in the future. -- Lisandro Dalcin --------------- CIMEC (INTEC/CONICET-UNL) Predio CONICET-Santa Fe Colectora RN 168 Km 472, Paraje El Pozo 3000 Santa Fe, Argentina Tel: +54-342-4511594 (ext 1011) Tel/Fax: +54-342-4511169 _______________________________________________ cython-devel mailing list cython-devel@python.org http://mail.python.org/mailman/listinfo/cython-devel
