How to convert void* type in C to string type in python?

Question

I tried to convert void* type in C to string in python when using Cython to wrapper C language, but I don't know how to convert the void* type to string , when converting the C int to python Py_ssize_t , like(a part of a class):

cpdef int peek_tail(self):
    cdef int value = <Py_ssize_t>cqueue.queue_peek_tail(self._c_queue)

When I want to convert it to string , how can I define it?

cpdef ? peek_tail(self):
    cdef ? value = <?>cqueue.queue_peek_tail(self._c_queue)

The ? is what I want. Any documents exist?

Answer 1

You can use char* on cdef but since your using cpdef you can just can also do str for bytes (py2) or unicode (py3). I believe the queue_peek_tail return is always Py_ssize_t .

See here for more specfic info. Especially the line

Generally speaking: unless you know what you are doing, avoid using C strings where possible and use Python string objects instead.