Created
August 26, 2018 08:07
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[pratice] Python3.5 call C++ function with extern "C"
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#include "hello.h" | |
#include<Python.h> | |
using namespace std; | |
extern "C"{ | |
static PyObject *_hello(PyObject *self, PyObject *args){ | |
hello(); | |
return self; | |
} | |
static PyMethodDef HelloMethods[] = { | |
{"hello", _hello, METH_VARARGS,""}, | |
{NULL, NULL, 0, NULL} | |
}; | |
static struct PyModuleDef hellomodule = { | |
PyModuleDef_HEAD_INIT, | |
"hello", /* name of module */ | |
NULL, /* module documentation, may be NULL */ | |
-1, /* size of per-interpreter state of the module, | |
or -1 if the module keeps state in global variables. */ | |
HelloMethods | |
}; | |
PyMODINIT_FUNC PyInit_hello(void){ | |
return PyModule_Create(&hellomodule); | |
} | |
} | |
void hello(){ | |
cout<<"Hello"<<endl; | |
return ; | |
} |
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#include<Python.h> | |
#include<iostream> | |
#include<cstdlib> | |
void hello(); |
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import hello | |
hello.hello() | |
print("END") |
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#include<iostream> | |
#include<cstdlib> | |
#include "./hello.h" | |
using namespace std; | |
int main(){ | |
hello(); | |
} |
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CPP = c++ | |
C = gcc | |
DELETE = rm -f | |
all: | |
${CPP} -fPIC -shared hello.cpp -o hello.so -I/usr/include/python3.5/ -L/usr/lib/python3.5/config-3.5m-x86_64-linux-gnu/ -lpython3.5 | |
exec_hello: | |
${CPP} main.cpp hello.cpp -o hello -I/usr/include/python3.5/ -L/usr/lib/python3.5/config-3.5m-x86_64-linux-gnu/ -lpython3.5 | |
clean: | |
${DELETE} hello hello.so |
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use
make
to build hello.so, then execpython3 hello.py
or use
make exec_hello
to build exec file, it test c++ code is right.finally, use
make clean
to delete .so file and exec file.