我有以下文件:
helloworld.cpp
其中包含
#include <iostream>
#include <Python.h>
void Helloworld(){
std::cout << "Hello world!" << "\n";
}
helloworld.pyx
其中包含:
cdef extern from "helloworld.cpp":
cpdef void Helloworld()
其中setup.py
包含:
from distutils.core import setup
from distutils.extension import Extension
from Cython.Build import cythonize
ext = Extension('helloworld', sources=["helloworld.pyx"], language="c++")
setup(name="helloworld", ext_modules = cythonize([ext]))
当我在 Ipython 中运行以下命令时,它会正确构建
In [1]: run setup.py build_ext --inplace --verbose
running build_ext
building 'helloworld' extension
gcc -pthread -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/home/ash/anaconda2/envs/python3/include/python3.5m -c helloworld.cpp -o build/temp.linux-x86_64-3.5/helloworld.o
cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
g++ -pthread -shared -L/home/ash/anaconda2/envs/python3/lib -Wl,-rpath=/home/ash/anaconda2/envs/python3/lib,--no-as-needed build/temp.linux-x86_64-3.5/helloworld.o -L/home/ash/anaconda2/envs/python3/lib -lpython3.5m -o /home/ash/CallingC++fromPython/Cython/HelloWorld/helloworld.cpython-35m-x86_64-linux-gnu.so
但是当我尝试导入它时,我收到以下错误:
In [2]: import helloworld
------------------------------------------------------------------------
ImportError Traceback (most recent call last)
<ipython-input-12-9f213747d34d> in <module>()
----> 1 import helloworld
ImportError: dynamic module does not define module export function (PyInit_helloworld)
我还尝试了以下方法:
helloworld.pyx
包含:
cdef extern from "helloworld.cpp":
void Helloworld()
def C_Helloworld():
return Helloworld()
在这种情况下,当我尝试构建它时,我得到:
run setup.py build_ext --inplace --verbose
running build_ext
building 'helloworld' extension
gcc -pthread -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/home/ash/anaconda2/envs/python3/include/python3.5m -c helloworld.cpp -o build/temp.linux-x86_64-3.5/helloworld.o
cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++
In file included from helloworld.cpp:458:0,
from helloworld.cpp:458,
from helloworld.cpp:458,
from helloworld.cpp:458,
...
from helloworld.cpp:458,
from helloworld.cpp:458,
from helloworld.cpp:458:
helloworld.cpp:16:20: error: #include nested too deeply
helloworld.cpp:23:20: error: #include nested too deeply
helloworld.cpp:163:27: error: #include nested too deeply
In file included from helloworld.cpp:458:0,
from helloworld.cpp:458,
from helloworld.cpp:458,
...
这意味着它被递归调用。