[Pyrex] Cannot 'see' C methods in extension types

[Nitin Madnani]

Whoops !! Upon closer inspection of the guide, I realize that the C  
methods are only meant to be called from Pyrex code. Sorry about that.

I still don't understand the different behaviors of  __eq__() and  
'==' , though.

Thanks again !
Nitin

On Sep 28, 2005, at 11:47 PM, Nitin Madnani wrote:

> Hi Guys
>
> I wanted to use C methods in my the extension types that I was  
> using and so I wrote this:
>
> cdef class State:
>     cdef unsigned char cover_vector
>     cdef int last_eng_position
>     cdef readonly State prev_state
>
>     def __init__(self):
>         self.last_eng_position = -1
>
>     def __eq__(self, State other):
>         return self.cost == other.cost and self.cover_vector ==  
> other.cover_vector
>
>     def __ne__(self, State other):
>         return self.cost != other.cost and self.cover_vector !=  
> other.cover_vector
>
>     cdef set_prev_state(self, State s):
>         self.prev_state = s
>
> A couple of questions:
>
> 1) When I try to call the C method from python, it complains:
> AttributeError: 'State' object has no attribute 'set_prev_state'
> Is there something that I am doing that is preventing me from using  
> these methods? The 'extension types' guide doesn't seem to say  
> anything else about it.
>
> 2) This code snippet:
>
>     from core import * # 'core' is the module that contains the  
> above pyrex code
>     s1 = State()
>     s2 = State()
>
>     s1 == s2 # returns False
>     s1.__eq__(s2) # returns 1
>
> So what's going on here? Isn't the '==' operator supposed to call  
> the __eq__() method?
>
> Thanks !
> Nitin
>
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