Python C-API和Unicode字符串

我需要在python对象和各种编码的c字符串之间进行转换.使用PyUnicode_Decode从c字符串到unicode对象非常简单，但是我不确定如何反过来

I need to convert between python objects and c strings of various encodings. Going from a c string to a unicode object was fairly simple using PyUnicode_Decode, however Im not sure how to go the other way

//char* can be a wchar_t or any other element size, just make sure it is correctly terminated for its encoding
Unicode(const char *str, size_t bytes, const char *encoding="utf-16", const char *errors="strict")
    :Object(PyUnicode_Decode(str, bytes, encoding, errors))
{
    //check for any python exceptions
    ExceptionCheck();
}

我想创建另一个函数，该函数采用python Unicode字符串，并使用给定的编码将其放入缓冲区，例如:

I want to create another function that takes the python Unicode string and puts it in a buffer using a given encodeing, eg:

//fills buffer with a null terminated string in encoding
void AsCString(char *buffer, size_t bufferBytes,
    const char *encoding="utf-16", const char *errors="strict")
{
    ...
}

我怀疑它与PyUnicode_AsEncodedString有关，但是返回了PyObject，所以我不确定如何将其放入缓冲区...

I suspect it has somthing to do with PyUnicode_AsEncodedString however that returns a PyObject so I'm not sure how to put that into my buffer...

注意:上面的两个方法都是包装python api的c ++ Unicode类的成员 我正在使用Python 3.0

Note: both methods above are members of a c++ Unicode class that wraps the python api I'm using Python 3.0