In C/C++, I believe this problem would be solved like this:
**matrix.h**
#ifndef MATRIX_H
#define MATRIX_H
/* declarations here */
#endif
**matrix.c**
#include "matrix.h"
/* implementation here */
Is there an equivalent to #ifndef in Pyrex? Or is there any other
solution to my problem?
I'm building a little math library in Pyrex, and I'm having trouble
with some circular cimports. I'll post short excerpts from my various
files, then show the error that I'm getting when I try to use one of
the modules.
**matrix.pxd**
cdef class Matrix:
cdef float m[4][4]
**matrix.pyx**
cimport vector
cdef class Matrix:
### a bunch of methods, including ones that create or manipulate
Vector objects ###
**vector.pxd**
cdef class Vector:
cdef float x, y, z, w
**vector.pyx**
cimport matrix
cdef class Vector:
### a bunch of methods, including one that has a Matrix argument ###
After building the Pyrex modules into .pyd files, I run a test module.
The first line imports the matrix module and throws this error:
Traceback (most recent call last):
File "C:\Development\SFStratPrototype\math3d\matrixTest.py", line 1,
in ?
import matrix
File "vector.pxd", line 1, in matrix
cdef class Vector:
File "matrix.pxd", line 1, in vector
cdef class Matrix:
AttributeError: 'module' object has no attribute 'Matrix'
Press any key to continue . . .
It doesn't seem to like how the modules cimport each other. I can't
see any way to eliminate this circular reference, so what can I do to
fix this error?
- Mike Wyatt
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