Method seek

crates/vm/src/stdlib/_io.rs:1651–1667

(
            &self,
            target: PyObjectRef,
            whence: OptionalArg<i32>,
            vm: &VirtualMachine,
        )

        #[pymethod]
        fn seek(
            &self,
            target: PyObjectRef,
            whence: OptionalArg<i32>,
            vm: &VirtualMachine,
        ) -> PyResult<Offset> {
            let whence = whence.unwrap_or(0);
            if !validate_whence(whence) {
                return Err(vm.new_value_error(format!("whence value {whence} unsupported")));
            }
            let mut data = self.lock(vm)?;
            let raw = data.check_init(vm)?;
            ensure_unclosed(raw, "seek of closed file", vm)?;
            check_seekable(raw, vm)?;
            let target = get_offset(target, vm)?;
            data.seek(target, whence, vm)
        }

        #[pymethod]
        fn tell(&self, vm: &VirtualMachine) -> PyResult<Offset> {