[Pyrex] __iter__ and yield

[Stefan Behnel]

Mike Wyatt, 20.09.2010 05:17:
> I want to write a simple iterator for my vector class, but this code isn't
> compiling:
>
>      def __iter__( cVector2 self ):
>          yield self.x      # line 247
>          yield self.y
>
> I get this error:
>
> pyrexc src/cVector2.pyx -->  src/cVector2.c
> C:\Development\MikeLib\src/cVector2.pyx:247:8: Syntax error in simple
> statement list

"yield" (i.e. generators and coroutines) is an unsupported feature in both 
Pyrex and Cython. Cython will hopefully get them implemented in the near 
future, although there's no time frame yet. There's a CEP, though:

http://wiki.cython.org/enhancements/generators

Stefan