Method recvfrom_into

crates/stdlib/src/socket.rs:1713–1739

(
            &self,
            buf: ArgMemoryBuffer,
            nbytes: OptionalArg<isize>,
            flags: OptionalArg<i32>,
            vm: &VirtualMachine,
        )

        #[pymethod]
        fn recvfrom_into(
            &self,
            buf: ArgMemoryBuffer,
            nbytes: OptionalArg<isize>,
            flags: OptionalArg<i32>,
            vm: &VirtualMachine,
        ) -> Result<(usize, PyObjectRef), IoOrPyException> {
            let mut buf = buf.borrow_buf_mut();
            let buf = &mut *buf;
            let buf = match nbytes {
                OptionalArg::Present(i) => {
                    let i = i.to_usize().ok_or_else(|| {
                        vm.new_value_error("negative buffersize in recvfrom_into")
                    })?;
                    buf.get_mut(..i).ok_or_else(|| {
                        vm.new_value_error("nbytes is greater than the length of the buffer")
                    })?
                }
                OptionalArg::Missing => buf,
            };
            let flags = flags.unwrap_or(0);
            let sock = self.sock()?;
            let (n, addr) = self.sock_op(vm, SelectKind::Read, || {
                sock.recv_from_with_flags(unsafe { slice_as_uninit(buf) }, flags)
            })?;
            Ok((n, get_addr_tuple(&addr, vm)))
        }

        #[pymethod]
        fn send(