Method getitem_by_slice

crates/stdlib/src/mmap.rs:1483–1512

(
            &self,
            slice: &SaturatedSlice,
            vm: &VirtualMachine,
        )

        }

        fn getitem_by_slice(
            &self,
            slice: &SaturatedSlice,
            vm: &VirtualMachine,
        ) -> PyResult<PyObjectRef> {
            let (range, step, slice_len) = slice.adjust_indices(self.__len__());

            let mmap = self.check_valid(vm)?;
            let slice_data = mmap.deref().as_ref().unwrap().as_slice();

            if slice_len == 0 {
                return Ok(PyBytes::from(vec![]).into_ref(&vm.ctx).into());
            } else if step == 1 {
                return Ok(PyBytes::from(slice_data[range].to_vec())
                    .into_ref(&vm.ctx)
                    .into());
            }

            let mut result_buf = Vec::with_capacity(slice_len);
            if step.is_negative() {
                for i in range.rev().step_by(step.unsigned_abs()) {
                    result_buf.push(slice_data[i]);
                }
            } else {
                for i in range.step_by(step.unsigned_abs()) {
                    result_buf.push(slice_data[i]);
                }
            }
            Ok(PyBytes::from(result_buf).into_ref(&vm.ctx).into())
        }

        fn getitem_inner(&self, needle: &PyObject, vm: &VirtualMachine) -> PyResult<PyObjectRef> {
            match SequenceIndex::try_from_borrowed_object(vm, needle, "mmap")? {