Method set_item

crates/vm/src/protocol/object.rs:743–769

(
        &self,
        needle: &K,
        value: PyObjectRef,
        vm: &VirtualMachine,
    )

    }

    pub fn set_item<K: DictKey + ?Sized>(
        &self,
        needle: &K,
        value: PyObjectRef,
        vm: &VirtualMachine,
    ) -> PyResult<()> {
        if let Some(dict) = self.downcast_ref_if_exact::<PyDict>(vm) {
            return dict.set_item(needle, value, vm);
        }

        let mapping = self.mapping_unchecked();
        if let Some(f) = mapping.slots().ass_subscript.load() {
            let needle = needle.to_pyobject(vm);
            return f(mapping, &needle, Some(value), vm);
        }

        let seq = self.sequence_unchecked();
        if let Some(f) = seq.slots().ass_item.load() {
            let i = needle.key_as_isize(vm)?;
            return f(seq, i, Some(value), vm);
        }

        Err(vm.new_type_error(format!(
            "'{}' does not support item assignment",
            self.class()
        )))
    }

    pub fn del_item<K: DictKey + ?Sized>(&self, needle: &K, vm: &VirtualMachine) -> PyResult<()> {
        if let Some(dict) = self.downcast_ref_if_exact::<PyDict>(vm) {