当然可以!
(在下文中,我假设你已经知道如何处理cimport
之间和交互.pxd
和.pyx
,如果这不是完全的情况下,只问我会开发部分以及)
示例(来自我的C ++项目,但是C项目的工作原理几乎相同):
假设将调用要创建的扩展名,myext
并且第3方共享库为libexternlib.so
(请注意 * 前缀,在此)…
# setup.py file
import sys
import os
import shutil
from distutils.core import setup
from distutils.extension import Extension
from Cython.Distutils import build_ext
# clean prevIoUs build
for root, dirs, files in os.walk(".", topdown=False):
for name in files:
if (name.startswith("myext") and not(name.endswith(".pyx") or name.endswith(".pxd"))):
os.remove(os.path.join(root, name))
for name in dirs:
if (name == "build"):
shutil.rmtree(name)
# build "myext.so" python extension to be added to "PYTHONPATH" afterwards...
setup(
cmdclass = {'build_ext': build_ext},
ext_modules = [
Extension("myext",
sources=["myext.pyx",
"SomeAdditionalCppClass1.cpp",
"SomeAdditionalCppClass2.cpp"
],
libraries=["externlib"], # refers to "libexternlib.so"
language="c++", # remove this if C and not C++
extra_compile_args=["-fopenmp", "-O3"],
extra_link_args=["-DSOME_DEFINE_OPT",
"-L./some/extra/dependency/dir/"]
)
]
)
libraries=["externlib"] # Without the 'lib' prefix and the '.so' extension...
myext.pxd
不要与.pyd
Windows混淆),并且myext.pyx
应该位于同一目录中。在编译时,将首先处理定义文件(如果存在)(更多内容)。
将目录更改为包含your myext.pxd
,yourmyext.pyx
和上述setup.py
脚本的目录后:
# setup.sh
# Make the "myext" Python Module ("myext.so")
CC="gcc" \
CXX="g++" \
CFLAGS="-I./some/path/to/includes/ -I../../../DEPENDENCIES/python2.7/inc -I../../../DEPENDENCIES/gsl-1.15" \
LDFLAGS="-L./some/path/to/externlib/" \
python setup.py build_ext --inplace
哪里:
注意: 也可以使用extra_compile_args
选项设置:
extra_compile_args=["-I./some/path/to/includes/", "-fopenmp", "-O3"]
注意: 也可以使用extra_link_args
选项设置:
extra_link_args=["-L./some/path/to/externlib/", "-DSOME_DEFINE_OPT", "-L./some/extra/dependency/dir/"]
distutils完成构建后,您将获得一些新文件,特别是myext.cpp
,myext.h
最重要的是myext.so
。
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:./some/path/to/externlib/
export PYTHONPATH=$PYTHONPATH:./some/path/to/myext/
# Run some script requiring "myext.so"
python somescript.py
新创建的Python扩展名可以通过其名称导入:
# somescript.py
import myext
from myext import PySomeFeature
...
:默认情况下-O2
,用于编译扩展,但是可以重载(请参见上面-O3
指定的设置)。
:如果将Cython安装在自定义目录中,则可能需要先将其添加到您的环境中:
PYTHONPATH=$PYTHONPATH:../../../DEPENDENCIES/Cython-0.18 export PYTHONPATH;
PATH=$PATH:../../../DEPENDENCIES/Cython-0.18/bin; export PATH;
好吧,希望我能讲到要点…