Method sendto

crates/stdlib/src/socket.rs:1786–1811

(
            &self,
            bytes: ArgBytesLike,
            arg2: PyObjectRef,
            arg3: OptionalArg<PyObjectRef>,
            vm: &VirtualMachine,
        )

        #[pymethod]
        fn sendto(
            &self,
            bytes: ArgBytesLike,
            arg2: PyObjectRef,
            arg3: OptionalArg<PyObjectRef>,
            vm: &VirtualMachine,
        ) -> Result<usize, IoOrPyException> {
            // signature is bytes[, flags], address
            let (flags, address) = match arg3 {
                OptionalArg::Present(arg3) => {
                    // should just be i32::try_from_obj but tests check for error message
                    let int = arg2
                        .try_index_opt(vm)
                        .unwrap_or_else(|| Err(vm.new_type_error("an integer is required")))?;
                    let flags = int.try_to_primitive::<i32>(vm)?;
                    (flags, arg3)
                }
                OptionalArg::Missing => (0, arg2),
            };
            let addr = self.extract_address(address, "sendto", vm)?;
            let buf = bytes.borrow_buf();
            let buf = &*buf;
            self.sock_op(vm, SelectKind::Write, || {
                self.sock()?.send_to_with_flags(buf, &addr, flags)
            })
        }

        #[cfg(all(unix, not(target_os = "redox")))]
        #[pymethod]