Amaury Forgeot d'Arc wrote:
> Stop me if I'm wrong, but I thought that bytes objects are immutable
> (they are based on the PyStringType, after all)
>
> But I was surprised by this code in test_socket.py::
>
> buf = b" "*1024
> nbytes = self.cli_conn.recv_into(buf)
>
I'm not sure about this one...
> And this in getargs.c::
>
> case 'w': { /* memory buffer, read-write access */
> ...
> ((temp = (*pb->bf_getbuffer)(arg, &view,
> PyBUF_SIMPLE)) != 0) ||
>
> (I'd expect PyBUF_READONLY)
This one is O.K. because 'w' is requesting read-write access. An error
will occur if the object does not allow it.
>
> And this in stringobject.c::
>
> static int
> string_buffer_getbuffer(PyStringObject *self, Py_buffer *view, int flags)
> {
> return PyBuffer_FillInfo(view, (void *)self->ob_sval, Py_SIZE(self),
> 0, flags);
> }
>
You are right that the 0 here should be a 1 for the immutable bytes object.
Good job.
-Travis O.
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