Method setdefault

crates/vm/src/dict_inner.rs:514–547

(&self, vm: &VirtualMachine, key: &K, default: F)

    }

    pub fn setdefault<K, F>(&self, vm: &VirtualMachine, key: &K, default: F) -> PyResult<T>
    where
        K: DictKey + ?Sized,
        F: FnOnce() -> T,
    {
        let hash = key.key_hash(vm)?;
        let mut default = Some(default);
        loop {
            let (index_entry, index_index) = self.lookup(vm, key, hash, None)?;
            if let Some(index) = index_entry.index() {
                let inner = self.read();
                if let Some(entry) = inner.get_entry_checked(index, index_index) {
                    return Ok(entry.value.clone());
                }
                continue;
            }
            let mut inner = self.write();
            if inner.indices.get(index_index) != Some(&index_entry) {
                continue;
            }
            let value = default
                .take()
                .expect("default must only be computed on insertion")();
            inner.unchecked_push(
                index_index,
                hash,
                key.to_pyobject(vm),
                value.clone(),
                index_entry,
            );
            self.bump_version();
            return Ok(value);
        }
    }

    #[allow(dead_code)]
    pub fn setdefault_entry<K, F>(