import UnityEngine.Flash;

ActionScript.Import("flash.utils.Dictionary");

using UnityEngine.Flash;
using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void Example() {
        ActionScript.Import("flash.utils.Dictionary");
    }
}

import UnityEngine.Flash
import UnityEngine
import System.Collections

class example(MonoBehaviour):

    def Example():
        ActionScript.Import('flash.utils.Dictionary')