vector assign in Cython

Question

Here is my program of cython

cdef struct Node:
    int v
    Node* next
    Node* pre

def f(int N):
    cdef:
        vector[Node*] narray
        int i
    narray.assign(N, 0)
    for i in xrange(N):
        narray[i] = 0

Cython compiling result:

Error compiling Cython file:
------------------------------------------------------------
...
    cdef:
        vector[Node*] narray
        int i
    narray.assign(N, 0)
    for i in xrange(N):
        narray[i] = 0
             ^
------------------------------------------------------------

testLinkList.pyx:107:14: Compiler crash in AnalyseExpressionsTransform

But I can use push_back() to append values at the end of the vector or use int instead of Node*. What is wrong?

Answer 1

What version of Cython are you using? Version 0.20.1 works for me with this code:

# distutils: language=c++

from libcpp.vector cimport vector

cdef struct Node:
    int v
    Node* next
    Node* pre

def f(int N):
    cdef:
        vector[Node*] narray
        int i
    narray.assign(N, NULL)
    for i in range(N):
        narray[i] = NULL

And with this setup.py file:

from distutils.core import setup
from Cython.Build import cythonize

setup(ext_modules=cythonize("test_vector.pyx"))