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我是 SIP 新手。我正在尝试为 C++ 文件创建一个简单的 python 包装器。如果您有 C++ 的示例 python 包装器，请帮助我。我有一个示例代码。但是当我运行命令时出现错误“sip: string.sip:72: This Python slot requires %MethodCode”：mkdir sipcode cp sipcode-Makefile sipcode/Makefile $(SIP) -s ".cc" -c sipcode字符串.sip

string.sip 的代码如下所述：

%模块字符串

命名空间标准{

类字符串 {

%TypeHeaderCode

包括字符串.h

％结尾

公共：字符串（）；

string(const char*);
string(const std::string&);

bool empty();
int length();
int size();
void resize(int, char);
void resize(int);
int capacity();
void reserve(int =0);

std::string& append(const std::string&);
std::string& append(const std::string&, int, int);
std::string& append(const char*);
std::string& append(const char*, int);
std::string& append(int, char);

std::string& insert(int, const std::string&);
std::string& insert(int, const std::string&, int, int);
std::string& insert(int, const char*);
std::string& insert(int, const char*, int);
std::string& insert(int, int, char);

int find(const std::string&, int = 0);
int find(const char*, int, int);
int find(const char*, int = 0);
int find(char, int = 0);

int rfind(const std::string&, int = -1);
int rfind(const char*, int, int);
int rfind(const char*, int = -1);
int rfind(char, int = -1);

int find_first_of(const std::string&, int = 0);
int find_first_of(const char*, int, int);
int find_first_of(const char*, int = 0);
int find_first_of(char, int = 0);

int find_first_not_of(const std::string&, int = 0);
int find_first_not_of(const char*, int, int);
int find_first_not_of(const char*, int = 0);
int find_first_not_of(char, int = 0);

int find_last_of(const std::string&, int = 0);
int find_last_of(const char*, int, int);
int find_last_of(const char*, int = 0);
int find_last_of(char, int = 0);

int find_last_not_of(const std::string&, int = 0);
int find_last_not_of(const char*, int, int);
int find_last_not_of(const char*, int = 0);
int find_last_not_of(char, int = 0);

std::string substr(int = 0, int = -1);

无效的str（）；%MemberCode const char* s; std::string* ptr;

    if (sipParseArgs(&sipArgsParsed,sipArgs,"J1",sipClass_std_string, &ptr))
    {
        s = ptr->c_str();
        /* Python API reference, P40 */
        return PyString_FromString(s);
    }

％结尾

无效的getitem（）；%MemberCode std::string* ptr; 诠释我; 

    if (sipParseArgs(&sipArgsParsed,sipArgs,"J1i",sipClass_std_string, &ptr, &i))
    {

        if (i >= ptr->length())
        {
                /* Python API Reference, Chapter 4 */
                PyErr_SetString ( PyExc_IndexError  ,"string index out of range" );
                return NULL;
        }
        else

                return Py_BuildValue("c", ptr->at(i));
    }

％结尾

}; };

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