[Pyrex] FAQ contribution (fwd)

[Greg Ewing]

John J Lee <jjl at pobox.com>:

> cdef MyExtensionType foo():
>     return MyExtensionType()
> 
> cdef class AnotherExtType:
> ...
>     def blah(self):
>         met = foo()
>         foo.attr  # Pyrex complains at runtime

That makes no sense. Maybe you meant
 
          met.attr

in which case you seem to be expecting Pyrex to do type inference. 
It doesn't. You need to say

    def blah(self):
        cdef MyExtensionType met
        met = foo()
        # met.attr will now be understood

Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury,	   | A citizen of NewZealandCorp, a	  |
Christchurch, New Zealand	   | wholly-owned subsidiary of USA Inc.  |
greg at cosc.canterbury.ac.nz	   +--------------------------------------+