how to cython class function's parameter accep

问题:

c++ header file code:

typedef int TSecurityFtdcErrorIDType;

typedef char TSecurityFtdcErrorMsgType[81];

struct CSecurityFtdcRspInfoField
{

    TSecurityFtdcErrorIDType    ErrorID;

    TSecurityFtdcErrorMsgType   ErrorMsg;
};

c++ class header :

class CSecurityFtdcMdSpi
{
  public:
    virtual void OnRspError(CSecurityFtdcRspInfoField *pRspInfo, int nRequestID, bool bIsLast) {};  
}

my pxd define:

ctypedef int TSecurityFtdcErrorIDType

ctypedef char TSecurityFtdcErrorMsgType[81]

cdef struct CSecurityFtdcRspInfoField:

    TSecurityFtdcErrorIDType    ErrorID

    TSecurityFtdcErrorMsgType    ErrorMsg

cython class define pxd:

cdef cppclass CSecurityFtdcMdSpi:
    void OnRspError(CSecurityFtdcRspInfoField *pRspInfo,
                    int nRequestID,
                    bool bIsLast) except +

if I try to define class in pyx files:

cdef class CSecurityMdSpi:
    cdef CSecurityFtdcMdSpi  *_this_md_spi 

    cpdef OnRspError(self, CSecurityFtdcRspUserLoginField *pRspInfo,
                 int nRequestID,
                 bool bIsLast) except +:
          self._this_md_spi.OnRspError(pRspInfo, nRequestID, bIsLast)

but when I try to compile the code , console output:

Cannot convert 'CSecurityFtdcRspInfoField *' to Python object

How could I convert the c++ struct in python , how to declare the struct parameter in cython , use cdef function or else?