1
我建這個是.soC++和Python的升壓功能簡單
#include <vector>
#include <boost/python.hpp>
#include <boost/python/suite/indexing/vector_indexing_suite.hpp>
extern "C"
{
// A function adding two integers and returning the result
int SampleAddInt(int i1, int i2)
{
return i1 + i2;
}
// A function doing nothing ;)
void SampleFunction1()
{
// insert code here
}
// A function always returning zero
int SampleFunction2()
{
// insert code here
return 0;
}
char const* greet()
{
return "hello, world";
}
}
#include <iostream>
#include <string>
class hello
{
public:
hello(const std::string& country)
{
this->country = country;
}
std::string greet() const
{
return "Hello from " + country;
}
private:
std::string country;
};
// A function taking a hello object as an argument.
std::string invite(const hello& w)
{
return w.greet() + "! Please come soon!";
}
boost::python::tuple HeadAndTail(boost::python::object sequence)
{
return make_tuple(sequence[0], sequence[-1]);
}
namespace py = boost::python;
BOOST_PYTHON_MODULE(hello_ext)
{
using namespace boost::python;
def("greet", greet);
def("SampleAddInt", SampleAddInt);
def("HeadAndTail", HeadAndTail);
// Create the Python type object for our extension class and define __init__ function.
boost::python::class_<hello>("hello", init<std::string>())
.def("greetclass", &hello::greet) // Add a regular member function.
.def("invite", invite) // Add invite() as a regular function to the module.
;
def("invite", invite); // Even better, invite() can also be made a member of module!!!
}
與boost_python鏈接它。
在蟒蛇，然後我說：（用正確的路徑。所以）
from ctypes import cdll
mydll = cdll.LoadLibrary('libHelloWorldPythonCpp.so')
# import hello_ext
print mydll.greet()
vec = [-4, -2, 0, 2, 4]
print vec
print mydll.HeadAndTail(vec)
不過，我得到一個奇怪的值當我打電話mydll.greet()的
-2015371328
的import hello_ext代碼如果我刪除了註釋ImportError: No module named hello_ext ，則會發出錯誤。
然而
print mydll.SampleAddInt(6, 3)
的作品，但我不能訪問代碼的其餘部分一樣inviteHeadAndTail等。例如
AttributeError: /home/idf/Documents/BOOST_Python/HelloWorldPythonCpp/bin/Release/libHelloWorldPythonCpp.so: undefined symbol: HeadAndTail
如果我提出
boost::python::tuple HeadAndTail(boost::python::object sequence)
{
return make_tuple(sequence[0], sequence[-1]);
}
內外部「C」然後它似乎工作。但然後我得到當我通過它VEC錯誤：
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python2.7/dist-packages/spyderlib/widgets/externalshell/sitecustomize.py", line 540, in runfile
execfile(filename, namespace)
File "/home/idf/.spyder2/.temp.py", line 17, in <module>
print mydll.HeadAndTail(vec)
ctypes.ArgumentError: argument 1: <type 'exceptions.TypeError'>: Don't know how to convert parameter 1
>>>
我做了
[email protected]:~/Documents/BOOST_Python/HelloWorldPythonCpp/bin/Release$ readelf -Ws libHelloWorldPythonCpp.so | grep -i sample
118: 0000000000008430 2 FUNC GLOBAL DEFAULT 11 SampleFunction1
120: 0000000000008440 3 FUNC GLOBAL DEFAULT 11 SampleFunction2
234: 0000000000008410 4 FUNC GLOBAL DEFAULT 11 SampleAddInt
[email protected]:~/Documents/BOOST_Python/HelloWorldPythonCpp/bin/Release$
即使
[email protected]:~/Documents/BOOST_Python/HelloWorldPythonCpp/bin/Release$ readelf -Ws libHelloWorldPythonCpp.so | grep -i head
230: 0000000000008560 483 FUNC GLOBAL DEFAULT 11 _Z11HeadAndTailN5boost6python3api6objectE
[email protected]:~/Documents/BOOST_Python/HelloWorldPythonCpp/bin/Release$
所以HeadAndTail似乎被截斷。
- 在問候等情況下我缺少什麼？
- 爲什麼導入hello_ext會報錯？
- 如何調用似乎是C++的HeadAndTail
- 什麼類型是Python中的boost :: python :: object序列？
- 如何在課堂內調用函數「greetclass」？
編輯：
我剛剛下載了這個
https://github.com/TNG/boost-python-examples
，一切編譯，似乎運行正常。我不明白我做錯了什麼，但是當我發現我會發表一個答案。