Question

尝试使用ctypes访问以下API文档时，我获得了ValueErrors：

doSomeThing(int *param1, 
            int **param2, 
            int **param3, 
            char **param4)
**Parameters**
param1
[in] Pointer to an integer. 
param2
[in, out] Pointer to an integer pointer. Will contain a pointer to a list of indexes [0.. param1-1] which can be looped over. 
param3
[in, out] Pointer to an integer pointer. Will contain a pointer to a list of param3 which can be looped over. The param3 are members of the following enumeration:
        enum EXAMPLE_TYPE
        {
            x = 0,
            y = 1,
                z = 2
        };
param4
[in, out] Pointer to a char pointer. Will contain a pointer to a list of strings which can be looped over

**Return value**
Status code value from the enumeration

这是代码：

print exemple_DLL
param1 = ctypes.c_int()
param2 = (ctypes.POINTER(ctypes.c_int)*1)()
param3 = (ctypes.POINTER(ctypes.c_int)*1)()
param4 = (ctypes.POINTER(ctypes.c_char)*50)()

exemple_DLL.doSomeThing(ctypes.byref(param1), ctypes.byref(param2), ctypes.byref(param3), ctypes.byref(param4))

打印输出：

ValueError：调用的过程没有足够的参数（缺少16个字节）或错误的调用约定第33行出错：＆＃39; exemple_DLL.doSomeThing（ctypes.byref（param1），ctypes.byref（param2），ctypes.byref（param3），ctypes.byref（param4））＆＃39;

任何人都知道使用ctypes在我的函数调用中会出现什么问题？

Answer 1

我解决了，必须这样做：

param1 = ctypes.c_int32()
param2 = ctypes.c_int32()
param3 = ctypes.c_int32()
param4 = ctypes.c_int32()

exemple_Dll.doSomeThing(ctypes.byref(param1), ctypes.byref(param2), ctypes.byref(param3), ctypes.byref(param4))

ValueError没有足够的参数 - 尝试使用ctypes访问DLL函数时

1 个答案: