I upgraded my Cython to version 0.23.4 and my code now leads to an AttributeError when I put the .pyx and .pxd files in subdirectories of my working directory. The minimal example containing the error is as follows:
Main python file in working directory:
import pyximport;
import os,sys;
pyximport.install()
sys.path.insert(0, os.getcwd()+'/pxd')
sys.path.insert(0, os.getcwd()+'/pyx')
from X import *
xObj = X(5)
pyx/X.pyx (i.e. in subdirectory pyx/):
cdef class X:
def __init__(self,var):
self.var = var
pxd/X.pxd (i.e. in subdirectory pxd/):
cdef class X:
cdef public int var
Running Main.py gives the following error:
AttributeError: 'X.X' object has no attribute 'var'
Note, the code runs fine if I move the X.pyx and X.pxd files into my working directory. But this is very inconvenient due to a large number of files.
What can I do to get the code running, whilst having the X.pyx and X.pxd in the subdirectories?
Cython expects the .pyx and .pxd files to be in the same directory as each other, (which doesn't have to be your working directory). As it currently stands I think you're importing only "X.pyx", and it isn't realising that "X.pxd" is related to it.
Therefore you could create a directory called "cython_files" (to keep your files out of your working directory), and in that directory you'd put both "X.pxd" and "X.pyx". You could then add "cython_files" to your path, and you wouldn't get any attribute errors.
Better yet, you could add an "__init__.py" to your "cython_files" directory and then it's treated as a Python module and you can do from cython_files.X import X, and not have to add anything to your path.
Edit for clarity: @romenic's answer identifies the same issue, but suggests a slightly different solution to it (which I suspect works) - this answer argues that OP really shouldn't organize their files in the way they do, rather than trying to work round it.