開源項目pybind11
項目主要功能是將C++代碼封裝爲Python接口,與boost.python類似,但比它小很多
1、下載pybind11
https://github.com/pybind/pybind11.git
2、安裝pybind11
pip install pybind11-master
3、編寫接口
example.cpp
int add(int i,int j){
return i +j;
}
PYBIND11_MODULE(my_example,m){
m.def("add",&add,"i"_a,"j"_b);
}
4、編寫安裝文件
setup.py
from setuptools import setup, Extension
from setuptools.command.build_ext import build_ext
import sys
import setuptools
__version__= '0.0.1'
class get_pybind_include(object):
def __init__(self,user=False):
sef.user = user
def __str__(self):
import pybind11
return pybind11.get_include(self.user)
ext_modules = [
Extension(
'my_example',
['example.cpp'],
include_dirs=[
get_pybind_include(),
get_pybind_include(user=True)
],
language='c++'
),
]
def has_flag(compiler, flagname):
import tempfile
with tempfile.NamedTemporaryFile('w',suffix='.cpp') as f:
f.write('int main (int argc, char **argv){return 0;}')
try:
compiler.compile([f.name],extra_postargs=[flagname])
except setuptools.setuptools.distutils.errors.CompileError:
return False
return True
def cpp_flag(compiler):
"""Return the -std=c++[11/14] compiler flag.
The c++14 is prefered over c++11 (when it is available).
"""
if has_flag(compiler, '-std=c++14'):
return '-std=c++14'
elif has_flag(compiler, '-std=c++11'):
return '-std=c++11'
else:
raise RuntimeError('Unsupported compiler -- at least C++11 support '
'is needed!')
class BuildExt(build_ext):
"""A custom build extension for adding compiler-specific options."""
c_opts = {
'msvc': ['/EHsc'],
'unix': [],
}
if sys.platform == 'darwin':
c_opts['unix'] += ['-stdlib=libc++', '-mmacosx-version-min=10.7']
def build_extensions(self):
ct = self.compiler.compiler_type
opts = self.c_opts.get(ct, [])
if ct == 'unix':
opts.append('-DVERSION_INFO="%s"' % self.distribution.get_version())
opts.append(cpp_flag(self.compiler))
if has_flag(self.compiler, '-fvisibility=hidden'):
opts.append('-fvisibility=hidden')
elif ct == 'msvc':
opts.append('/DVERSION_INFO=\\"%s\\"' % self.distribution.get_version())
for ext in self.extensions:
ext.extra_compile_args = opts
build_ext.build_extensions(self)
setup(
name='my_example',
version=__version__,
author='Sylvain Corlay',
author_email='[email protected]',
url='https://github.com/pybind/python_example',
description='A test project using pybind11',
long_description='',
ext_modules=ext_modules,
install_requires=['pybind11>=2.2'],
cmdclass={'build_ext': BuildExt},
zip_safe=False,
)
5、安裝
pip install myexample
6、測試代碼
> import my_example
> my_example.add(3,4)
7