示例1：

pycallclass.cpp：

#include <iostream>using namespace std;typedef unsigned char BYTE;#define MAX_COUNT 20 struct tagOutCardResult_py{ BYTE cbCardCount; BYTE cbResultCard1; BYTE cbResultCard2; BYTE cbResultCard3; BYTE cbResultCard4; BYTE cbResultCard5; BYTE cbResultCard6; BYTE cbResultCard7; BYTE cbResultCard8; BYTE cbResultCard9; BYTE cbResultCard10; BYTE cbResultCard11; BYTE cbResultCard12; BYTE cbResultCard13; BYTE cbResultCard14; BYTE cbResultCard15; BYTE cbResultCard16; BYTE cbResultCard17; BYTE cbResultCard18; BYTE cbResultCard19; BYTE cbResultCard20;}; struct tagOutCardResult{ BYTE cbCardCount; BYTE cbResultCard[MAX_COUNT]; void clear() { cbCardCount = 0; for (int nIdx = 0;nIdx < MAX_COUNT;++nIdx) { cbResultCard[nIdx] = 0; } } void topy(tagOutCardResult_py* ppy) { cout<<"topy function begin"<<endl; ppy->cbCardCount = cbCardCount; cout<<"topy function 1"<<endl; ppy->cbResultCard1 = cbResultCard[1 - 1]; cout<<"topy function 2"<<endl; ppy->cbResultCard2 = cbResultCard[2 - 1]; ppy->cbResultCard3 = cbResultCard[3 - 1]; ppy->cbResultCard4 = cbResultCard[4 - 1]; ppy->cbResultCard5 = cbResultCard[5 - 1]; ppy->cbResultCard6 = cbResultCard[6 - 1]; ppy->cbResultCard7 = cbResultCard[7 - 1]; ppy->cbResultCard8 = cbResultCard[8 - 1]; ppy->cbResultCard9 = cbResultCard[9 - 1]; ppy->cbResultCard10 = cbResultCard[10 - 1]; ppy->cbResultCard11 = cbResultCard[11 - 1]; ppy->cbResultCard12 = cbResultCard[12 - 1]; ppy->cbResultCard13 = cbResultCard[13 - 1]; ppy->cbResultCard14 = cbResultCard[14 - 1]; ppy->cbResultCard15 = cbResultCard[15 - 1]; ppy->cbResultCard16 = cbResultCard[16 - 1]; ppy->cbResultCard17 = cbResultCard[17 - 1]; ppy->cbResultCard18 = cbResultCard[18 - 1]; ppy->cbResultCard19 = cbResultCard[19 - 1]; ppy->cbResultCard20 = cbResultCard[20 - 1]; cout<<"topy function end"<<endl; }}; class TestLib{ public: void display(tagOutCardResult& ret);};void TestLib::display(tagOutCardResult& ret) { ret.cbCardCount = 3; ret.cbResultCard[0] = 1; ret.cbResultCard[1] = 50; ret.cbResultCard[2] = 100; cout<<"First display aaa "; cout<<"hello "; cout<<"world ";} extern "C" { TestLib oGameLogic; void display(tagOutCardResult_py* ret_py) { tagOutCardResult oRet; oGameLogic.display(oRet); cout<<"before topy"<<endl; oRet.topy(ret_py); cout<<"after topy"<<endl; cout<<"in cpp:ret_py->cbCardCount:"<<ret_py->cbCardCount<<endl; cout<<"in cpp:ret_py->cbResultCard1:"<<ret_py->cbResultCard1<<endl; cout<<" this:" << ret_py << endl; }}

编译脚本：

g++ -o libpycallclass.so -shared -fPIC pycallclass.cpp -I/usr/include/python2.6 -L/usr/lib64/python2.6/config

Game.py调用部分。类声明：

import ctypes class tagOutCardResult_py(ctypes.Structure): _fields_ = [("cbCardCount", ctypes.c_ubyte), \("cbResultCard1", ctypes.c_ubyte), \("cbResultCard2", ctypes.c_ubyte), \("cbResultCard3", ctypes.c_ubyte), \("cbResultCard4", ctypes.c_ubyte), \("cbResultCard5", ctypes.c_ubyte), \("cbResultCard6", ctypes.c_ubyte), \("cbResultCard7", ctypes.c_ubyte), \("cbResultCard8", ctypes.c_ubyte), \("cbResultCard9", ctypes.c_ubyte), \("cbResultCard10", ctypes.c_ubyte), \("cbResultCard11", ctypes.c_ubyte), \("cbResultCard12", ctypes.c_ubyte), \("cbResultCard13", ctypes.c_ubyte), \("cbResultCard14", ctypes.c_ubyte), \("cbResultCard15", ctypes.c_ubyte), \("cbResultCard16", ctypes.c_ubyte), \("cbResultCard17", ctypes.c_ubyte), \("cbResultCard18", ctypes.c_ubyte), \("cbResultCard19", ctypes.c_ubyte), \("cbResultCard20", ctypes.c_ubyte)]

Game.py调用部分。具体调用：

import ctypes so = ctypes.cdll.LoadLibrary lib = so("./libpycallclass.so") ERROR_MSG('display(\)') ret = tagOutCardResult_py(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0) ERROR_MSG("before lib.display(ctypes.byref(ret))") lib.display(ctypes.byref(ret)) ERROR_MSG("after lib.display(ctypes.byref(ret))") ERROR_MSG('#######################################################################################') ERROR_MSG(ret) ERROR_MSG(ret.cbCardCount) ERROR_MSG(ret.cbResultCard1) ERROR_MSG(ret.cbResultCard2) ERROR_MSG(ret.cbResultCard3) ERROR_MSG(type(ret))

传入一个结构体，使用引用返回，回到python中打印出来结果是对的。

这样就可以传入，可以传出了。

示例1end#########################################################################

示例2：

pycallclass.cpp:

#include <iostream>using namespace std;typedef unsigned char BYTE;#define MAX_COUNT 20 #if defined(WIN32)||defined(WINDOWS)#define DLL_EXPORT __declspec(dllexport)#else#define DLL_EXPORT#endif struct ByteArray_20{ BYTE e1; BYTE e2; BYTE e3; BYTE e4; BYTE e5; BYTE e6; BYTE e7; BYTE e8; BYTE e9; BYTE e10; BYTE e11; BYTE e12; BYTE e13; BYTE e14; BYTE e15; BYTE e16; BYTE e17; BYTE e18; BYTE e19; BYTE e20;};struct ByteArray_20_3{ ByteArray_20 e1; ByteArray_20 e2; ByteArray_20 e3;}; struct ByteArrayNew_20_3{ BYTE e[3][20];}; class TestLib{ public: void LogicFunc(ByteArray_20_3& ret); void LogicFuncNew(ByteArrayNew_20_3& ret);};void TestLib::LogicFunc(ByteArray_20_3& ret) { ret.e1.e1 = 3; ret.e1.e2 = 1; ret.e1.e3 = 50; ret.e2.e1 = 100; ret.e2.e2 = 200; ret.e2.e3 = 20; cout<<"TestLib::LogicFunc"<<endl;}void TestLib::LogicFuncNew(ByteArrayNew_20_3& ret) { ret.e[0][0] = 31; ret.e[0][1] = 11; ret.e[0][2] = 51; ret.e[1][0] = 101; ret.e[1][1] = 201; ret.e[1][2] = 21; cout << "TestLib::LogicFuncNew" << endl;} extern "C" { TestLib oGameLogic; void DLL_EXPORT display(ByteArray_20_3* pret) { cout<<"cpp display func begin"<<endl; oGameLogic.LogicFunc(*pret); cout<<"cpp display func end"<<endl; } void DLL_EXPORT display2(ByteArrayNew_20_3* pret) { cout << "cpp display2 func begin" << endl; oGameLogic.LogicFuncNew(*pret); cout << "cpp display2 func end" << endl; }}

pycallclass.py:

import ctypes def ERROR_MSG(str): print str class ByteArray_20(ctypes.Structure): _fields_ = [\("e1", ctypes.c_ubyte), \("e2", ctypes.c_ubyte), \("e3", ctypes.c_ubyte), \("e4", ctypes.c_ubyte), \("e5", ctypes.c_ubyte), \("e6", ctypes.c_ubyte), \("e7", ctypes.c_ubyte), \("e8", ctypes.c_ubyte), \("e9", ctypes.c_ubyte), \("e10", ctypes.c_ubyte), \("e11", ctypes.c_ubyte), \("e12", ctypes.c_ubyte), \("e13", ctypes.c_ubyte), \("e14", ctypes.c_ubyte), \("e15", ctypes.c_ubyte), \("e16", ctypes.c_ubyte), \("e17", ctypes.c_ubyte), \("e18", ctypes.c_ubyte), \("e19", ctypes.c_ubyte), \("e20", ctypes.c_ubyte)] class ByteArray_20_3(ctypes.Structure): _fields_ = [\("e1", ByteArray_20), \("e2", ByteArray_20), \("e3", ByteArray_20)] def __init__(self): self.aaa = 123 self.bbb = [1, 2, 3, 4, 5] self.ccc = "alksdfjlasdfjk" def test(self): self.aaa = 123 self.bbb = [1, 2, 3, 4, 5] self.ccc = "alksdfjlasdfjk" self.e1.e1 = 5 self.e1.e2 = 20 so = ctypes.cdll.LoadLibrarylib = so("./libpycallclass.dll")print('display()')ret = ByteArray_20_3()ret.test()ERROR_MSG(ret.e1.e1)ERROR_MSG(ret.e1.e2)print("before lib.display(ctypes.byref(ret))")lib.display(ctypes.byref(ret))print("after lib.display(ctypes.byref(ret))")print('#######################################################################################')print(ret)ERROR_MSG(ret.e1)ERROR_MSG(ret.e2)ERROR_MSG(ret.e3)ERROR_MSG(ret.e1.e1)ERROR_MSG(ret.e1.e2)ERROR_MSG(ret.e1.e3)ERROR_MSG(ret.e2.e1)ERROR_MSG(ret.e2.e2)ERROR_MSG(ret.e2.e3)ERROR_MSG(type(ret)) print("before lib.display2(ctypes.byref(ret))")lib.display2(ctypes.byref(ret))print("after lib.display2(ctypes.byref(ret))")print('#######################################################################################')print(ret)ERROR_MSG(ret.e1)ERROR_MSG(ret.e2)ERROR_MSG(ret.e3)ERROR_MSG(ret.e1.e1)ERROR_MSG(ret.e1.e2)ERROR_MSG(ret.e1.e3)ERROR_MSG(ret.e2.e1)ERROR_MSG(ret.e2.e2)ERROR_MSG(ret.e2.e3)ERROR_MSG(type(ret)) ret.test()ERROR_MSG(ret.e1.e1)ERROR_MSG(ret.e1.e2)

g++:

g++ -o libpycallclass.so -shared -fPIC pycallclass.cpp -I/usr/include/python2.6 -L/usr/lib64/python2.6/config

windows:

新建一个DLL工程，把pycallclass.cpp加进去，编译成DLL就OK了。

千万注意python的运行时是32位的还是64位的，DLL或者SO必须和它对应。

python类可以嵌套使用，继承ctypes.Structure，部分成员是_fields_里定义的，部分成员在__init__里定义，这样的类也可以ctypes.byref(self)传进c++去，传的是指针，传入传出就都OK了。

注意示例2中ByteArrayNew_20_3的用法，python中是定义了20个变量，c++中是直接一个二维数组。内存结构是一致的，所以可以直接这样使用。注意类型和长度必须一致，否则可能会内存访问越界。

以上这篇python调用c++ ctype list传数组或者返回数组的方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。