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Message from discussion __init__ not creating python variables.
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Robert Bradshaw  
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 More options Nov 13 2012, 1:21 pm
From: Robert Bradshaw <rober...@gmail.com>
Date: Tue, 13 Nov 2012 10:20:44 -0800
Local: Tues, Nov 13 2012 1:20 pm
Subject: Re: [cython-users] __init__ not creating python variables.
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On Tue, Nov 13, 2012 at 10:13 AM, RC <ravi...@gmail.com> wrote:
> In the following example, i am facing an issue in initializing python object
> variables:

> cdef extern from "X.h" namespace "xxx":
>    cdef cppclass X:
>           char* create(char*)
>           void update(char*)

> cdef class PyX:
>     cdef X* xPtr
>     def __cinit__(self):
>         xPtr = ....

>     def __init__(self):
>         self.created = False

>     def create(self, name):
>          ptr = self.xPtr.create(name)
>          self.created = True
>          return ptr

>     def update(self, name):
>         if self.created:
>             self.xPtr.update(name)
>             return True
>         return False

> It compiles fine but when i create an instance of X it complains:
> AttributeError: 'X' object has no attribute 'created'

> Any ideas on how to work around this is appreciated.

All members of cdef functions must be explicitly declared. Write

cdef class PyX:
    cdef X* xPtr
    cdef object created
    ...

(Might as well make "created" a public bint, no need to let it be a
Python object if it's going to be True/False.)

- Robert


 
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