c给python混合编程_请教下python怎么和C或者C++混合编程

网上找来的看下。。

附1 text.txt

this is test text in text.txt.

附2 mymod.py

import string

message &＃61; &＃39;&＃39;original string&＃39;&＃39;

message &＃61;message&＃43;message

msg_error&＃61;""

try:

text_file &＃61; open("text.txt", "r")

whole_thing &＃61; text_file.read()

print whole_thing

text_file.close()

except IOError, (errno, strerror):

print "I/O error(%s): %s" % (errno, strerror)

def transform(input):

#input &＃61; string.replace(input, &＃39;&＃39;life&＃39;&＃39;, &＃39;&＃39;Python&＃39;&＃39;)

return string.upper(input)

def change_msg(nul):

global message #如果没有此行&＃xff0c;message是函数里头的局部变量

message&＃61;&＃39;&＃39;string changed&＃39;&＃39;

return message

def r_file(nul):

return whole_thing

def get_msg(nul):

return message

附3 simplepy.h

using std::string;

class CSimplepy // : private noncopyable

{

public:

///constructor

CSimplepy()

{

Py_Initialize();

pstr&＃61;NULL, pmod&＃61;NULL, pdict&＃61;NULL;

pfunc&＃61;NULL, pargs&＃61;NULL;

}

virtual ~CSimplepy()

{

Py_Finalize();

}

bool ImportModule(const char* mod_name)

{

try{

pmod  &＃61; PyImport_ImportModule(const_cast(mod_name));

if(pmod&＃61;&＃61;NULL)

return false;

pdict &＃61; PyModule_GetDict(pmod);

}

catch(...)

{

return false;

}

if(pmod!&＃61;NULL && pdict!&＃61;NULL)

return true;

else

return false;

}

int Run_SimpleString(const char* str)

{

return PyRun_SimpleString(const_cast(str) );

}

string Run_String(const char* str)

{

char *cstr;

pstr  &＃61; PyRun_String(str, Py_eval_input, pdict, pdict);

if(pstr&＃61;&＃61;NULL)

throw ("when Run_String, there is an exception was raised by Python environment.");

PyArg_Parse(pstr, "s", &cstr);

return string(cstr);

}

string CallObject(const char* func_name, const char* parameter)

{

pfunc&＃61;NULL;

pfunc &＃61; PyObject_GetAttrString(pmod, const_cast(func_name));

if(pfunc&＃61;&＃61;NULL)

throw (string("do not found in Python module for: ")

&＃43;func_name).c_str();

char* cstr;

pargs &＃61; Py_BuildValue("(s)", const_cast(parameter));

pstr  &＃61; PyEval_CallObject(pfunc, pargs);

if(pstr&＃61;&＃61;NULL)

throw ("when PyEval_CallObject, there is an exception was raised by Python environment");

PyArg_Parse(pstr, "s", &cstr);

return string(cstr);

}

protected:

PyObject *pstr, *pmod, *pdict;

PyObject *pfunc, *pargs;

};