Python Cython 编译错误：动态模块未定义模块导出功能
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Cython Compilation Error: dynamic module does not define module export function
提问by Alger Remirata
I am building a package in Cython. I am using the following as the structure for setup.py:
我正在 Cython 中构建一个包。我使用以下作为结构setup.py：
from distutils.core import setup
from distutils.extension import Extension
from Cython.Build import cythonize
import numpy
import scipy
extensions = [
Extension("xxxxx",["xxxx/xxxxx.pyx"],
include_dirs=[numpy.get_include(),"."]),
Extension("nnls",["xxxxx/xxxxx.pyx"],
include_dirs=[numpy.get_include(),"."]),
]
setup(
name='xxxxxx',
version='0.0.0',
description='''********''',
url='xxxxxxx',
author='xxxxx',
author_email='xxxxx',
packages=[
'xxxxx',
],
install_requires=[
'cython',
'numpy',
'scipy',
],
ext_modules=cythonize(extensions),
)
However, I am getting an error upon installation in Python 3. It is working in Python 2 however, it is not compiling in Python 3 having the following error:
但是，我在 Python 3 中安装时遇到错误。它在 Python 2 中工作，但是，它没有在 Python 3 中编译，出现以下错误：
dynamic module does not define module export function
动态模块没有定义模块导出功能
How can I solve this problem? Is the structure of the setup.pythe reason why this is not compiling?
我怎么解决这个问题？setup.py这是不是编译的原因的结构吗？
采纳答案by DavidW
You need to call setup.py with Python 3 (python3 setup.py build_ext, maybe --inplace). It's because Python 3 defines a different name for the initfunction called when the module starts, and so you need to build it using Python 3 to ensure the correct name is generated.
您需要使用 Python 3 ( python3 setup.py build_ext，也许--inplace)调用 setup.py 。这是因为 Python 3 为init模块启动时调用的函数定义了不同的名称，因此您需要使用 Python 3 构建它以确保生成正确的名称。
See dynamic module does not define init function (PyInit_fuzzy)and How to specify Python 3 source in Cython's setup.py?for slightly more detail (it's bordering on a duplicate of these questions, but isn't quite in my view)
请参阅动态模块未定义 init 函数 (PyInit_fuzzy)以及如何在 Cython 的 setup.py 中指定 Python 3 源代码？稍微详细一点（它与这些问题的重复接近，但在我看来并不完全）
回答by Den-Jason
I experienced this and found that I had to use the same name of .pyx as the module name, e.g.
我经历了这个，发现我必须使用与模块名称相同的 .pyx 名称，例如
makefile:
生成文件：
# (default)
# INSTALL_DIR:=/usr/lib/python3.6/site-packages
# (my venv)
INSTALL_DIR:=/home/<username>/python3_venv/lib/python3.6/site-packages
all:
sudo python3 setup_myproj.py install --install-lib ${INSTALL_DIR}
setup_myproj.py
setup_myproj.py
from distutils.core import setup, Extension
from Cython.Build import cythonize
ext = Extension("myproj",
sources=["myproj.pyx", "myCppProjFacade.cpp"],
<etc>
language="c++"
)
setup(name="myproj",
version="0.0.1",
ext_modules=cythonize(ext))
client module, run after installing to venv
客户端模块，安装到 venv 后运行
import myproj as myCppProjWrapper
...
I also found that if the "myproj" names are different, under <python-lib-dir>/<python-vers>/site-packagesthe .so and .egg-info names are different and the client fails to load it.
我还发现，如果“myproj”名称不同，<python-lib-dir>/<python-vers>/site-packages则 .so 和 .egg-info 下的名称不同，客户端无法加载它。
In addition I found that the client's environment does not need to have the cythonpackage installed.
另外我发现客户端的环境不需要cython安装这个包。
