cdef extern from "Python.h":
    void PyErr_Clear()
    int PyObject_AsCharBuffer(object obj, char **buffer, int *buffer_len) except -1
    int PyObject_AsReadBuffer(object obj, char **buffer, int *buffer_len) except -1
    int PyObject_AsWriteBuffer(object obj, char **buffer, int *buffer_len) except -1
    int PyObject_CheckReadBuffer(object obj) except -1
    int PyMac_GetStr255(object obj, Str255 pbuf) except 0
    int PyString_AsStringAndSize(object obj, char **buffer, int *length) except -1
    object PyString_FromStringAndSize(char *v, int len)
    object PyUnicode_FromUnicode(UniChar *u, int size)
    cdef UniChar* PyUnicode_AS_UNICODE(object o)
    void* PyMem_Realloc(void *p, int n)
    void* PyMem_Malloc(int n)
    void PyMem_Free(void *p)