Method get_chain_exact

crates/vm/src/builtins/dict.rs:772–781

Look up `key` in `self`, falling back to `other`. Both dicts must be exact `dict` types (enforced by `PyExact`).

(
        &self,
        other: &Self,
        key: &K,
        vm: &VirtualMachine,
    )

    /// Look up `key` in `self`, falling back to `other`.
    /// Both dicts must be exact `dict` types (enforced by `PyExact`).
    pub(crate) fn get_chain_exact<K: DictKey + ?Sized>(
        &self,
        other: &Self,
        key: &K,
        vm: &VirtualMachine,
    ) -> PyResult<Option<PyObjectRef>> {
        debug_assert!(self.class().is(vm.ctx.types.dict_type));
        debug_assert!(other.class().is(vm.ctx.types.dict_type));
        self.entries.get_chain(&other.entries, vm, key)
    }
}

// Implement IntoIterator so that we can easily iterate dictionaries from rust code.