python数组指针
1. ptyhong璋幂敤DLL锛屾庝箞浣跨敤缁撴瀯浣撴暟缁勬寚阍埚仛鍙傛暟
ptyhong璋幂敤DLL锛屽备綍浣跨敤缁撴瀯浣鏁扮粍鎸囬拡锅氩弬鏁
C++鍑芥暟铡熷瀷
typedef struct
{
unsigned long DeviceType;
int Handle;
int NumberOfClients;
int SerialNumber;
int MaxAllowedClients;
}NeoDevice;
int _stdcall icsneoFindNeoDevices(unsigned long DeviceTypes, NeoDevice *pNeoDevices, int *pNumberOfDevices);
浣跨敤python濡备笅锛
class NeoDevice(Structure):
_fields_ = [("DeviceType",c_ulong),
("Handle",c_int),
("NumberOfClients",c_int),
("SerialNumber",c_int),
("MaxAllowedClients",c_int)]
class cNeoVICan(CCanBase):
def __init__(self):
neoVi = windll.icsneo40
self.icsneoFindNeoDevices = neoVi.icsneoFindNeoDevices
if __name__ == "__main__":
canBus = cNeoVICan()
print canBus.icsneoGetDLLVersion()
iNumberOfDevices = [NeoDevice() for x in range(10)]
num = c_int
iResult = canBus.icsneoFindNeoDevices(c_ulong(65535), pointer(iNumberOfDevices), byref(num))
浣嗘槸浼氭姤濡备笅阌栾锛
Traceback (most recent call last):
File "C:\Work\Project\GUI\wxPyCANC303\Drv\source\src\drv\neoVI\cNeoVICan.py", line 224, in <mole>
iResult = canBus.icsneoFindNeoDevices(c_ulong(65535), pointer(iNumberOfDevices), byref(num))
TypeError: _type_ must have storage info
璇烽梾鏄浠涔堥敊璇铡熷洜鍟婏纻
璋㈣阿銆
------瑙ｅ喅鏂规--------------------
锲犱负python镄刲ist涓嶆槸涓涓猚types绫诲瀷
姝ｇ‘锅氭硶鏄
class NeoDevice(Structure):
_fields_ = [("DeviceType",c_ulong),
("Handle",c_int),
("NumberOfClients",c_int),
("SerialNumber",c_int),
("MaxAllowedClients",c_int)]
class cNeoVICan(CCanBase):
def __init__(self):
neoVi = windll.icsneo40
self.icsneoFindNeoDevices = neoVi.icsneoFindNeoDevices
if __name__ == "__main__":
canBus = cNeoVICan()
print canBus.icsneoGetDLLVersion()
iNumberOfDevices = (NeoDevice * 10)()
num = c_int()
iResult = canBus.icsneoFindNeoDevices(c_ulong(65535), cast(iNumberOfDevices, POINT(NeoDevice)), byref(num))
2. 编程语言Python和Java哪个简单呀
编程语言Python和Java相比较而言，Python更简单一点。以下内容会详细介绍两款编程语言。
总之，Python 和Java 都是功能很强大的编程语言，建议新手先从Python 开始学。
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4. C++调用时python时，如何传入数组做为参数
题主，你基本操作没什么问题，有几个小地方要修改一下，修改如下：
你的源码：
PyObject* list = PyList_New(3);
for (size_t i = 0; i < 3; i++)
PyList_Append(list, Py_BuildValue("i", i));
PyEval_CallObject(pFunc, list);
--------------------------------------------------------------------------------------
修改后，应该是这样
PyObject*pArgs=NULL;
PyObject*list=PyList_New(0);//3改成0
pArgs=PyTuple_New(1);//定义1个参数
for(size_ti=0;i<3;i++)
PyList_Append(list,Py_BuildValue("i",i));//这样才能用Append，
PyTuple_SetItem(pArgs,0,list);//将列表赋给参数
PyEval_CallObject(pFunc,list);//传入参数，调用函数
注意事项：PyList_New(0)初始化0的时候，应该用Append初始化
PyList_New(3)初始化3个时候，应该用SetItem初始化
如果用Append的话，会出现[NULL,NULL,NULL]的情况
我在给一个完整的：
Python ：(hello.py)
defTestList(nlist):
print(nlist)
return
一般参数都是已元组形式传入的
Py_Initialize();
PyRun_SimpleString("importsys");
PyRun_SimpleString("sys.path.append('./')");
PyObject*pMole=NULL;
PyObject*pList=NULL;
PyObject*pFunc=NULL;
PyObject*pArgs=NULL;
pMole=PyImport_ImportMole("hello");
pFunc=PyObject_GetAttrString(pMole,"TestList");
pArgs=PyTuple_New(1);
pList=PyList_New(0);
for(inti=0;i<3;i++)
{
PyList_Append(pList,Py_BuildValue("i",i));
}
PyTuple_SetItem(pArgs,0,pList);
pRet=PyEval_CallObject(pFunc,pArgs);
Py_Finalize();
最后输出的：[0, 1, 2]