Method recvfrom

crates/stdlib/src/socket.rs:1693–1710

(
            &self,
            bufsize: isize,
            flags: OptionalArg<i32>,
            vm: &VirtualMachine,
        )

        #[pymethod]
        fn recvfrom(
            &self,
            bufsize: isize,
            flags: OptionalArg<i32>,
            vm: &VirtualMachine,
        ) -> Result<(Vec<u8>, PyObjectRef), IoOrPyException> {
            let flags = flags.unwrap_or(0);
            let bufsize = bufsize
                .to_usize()
                .ok_or_else(|| vm.new_value_error("negative buffersize in recvfrom"))?;
            let mut buffer = Vec::with_capacity(bufsize);
            let (n, addr) = self.sock_op(vm, SelectKind::Read, || {
                self.sock()?
                    .recv_from_with_flags(buffer.spare_capacity_mut(), flags)
            })?;
            unsafe { buffer.set_len(n) };
            Ok((buffer, get_addr_tuple(&addr, vm)))
        }

        #[pymethod]
        fn recvfrom_into(