Host Python in your application with IronPython 2.0.1(二): 互相訪問

在第一篇中只是簡單的建立了一個互動環境,這樣還達不到我的目標,為了將python整合進應用,還需要讓python和我們的.net應用互相可以訪問.

在IronPython Alpha1中,是有一個CHM文檔的,下載了正式版之後,居然找不到了...在maillist中問了之後才知道, 原來搞了份DOC檔,放在http://dlr.codeplex.com/. 下載之後才發現是專門講HOST的,真爽(下載頁面看這裡).

今天的任務比較簡單, 向python引擎中放一個簡單變數a, 然後用python修改它, 再讀回來,代碼如:

        public void Run1() {            helper.DefaultScope.SetVariable("a", 1);            helper.Execute("print 'visit a in python: ', a");            helper.Execute("print 'modify a into 2'");            helper.Execute("a=2");            object a = helper.DefaultScope.GetVariable("a");            helper.PrintLn("get a from python", a);        }

helper是自己整理了一個專門用於初始化環境並執行python語句的類,以後希望可以逐步整理,並用在以後的應用中.代碼如下:

using System;using System.Collections.Generic;using System.Text;using Microsoft.Scripting.Hosting;using IronPython.Hosting;namespace AccessEach {        ///     /// IronPython Helper    ///     public sealed class IPHelper {        #region private        private IPHelper() {            _defaultEngine = Python.CreateEngine();            _defaultScope = _defaultEngine.CreateScope();        }        private ScriptEngine _defaultEngine ;        private ScriptScope _defaultScope ;        private static IPHelper _helper = new IPHelper();        public static IPHelper Instance {            get { return _helper; }        }        #endregion        #region IronPython functions        ///         /// Get the Default python Engine        ///         public ScriptEngine DefaultEngine {            get {                return _defaultEngine;            }        }        ///         /// default scrope of default engin        ///         public ScriptScope DefaultScope {            get {                return _defaultScope;            }        }        public object Execute(string cmd, ScriptScope scope, ScriptEngine engine) {            ScriptSource source = engine.CreateScriptSourceFromString(cmd, Microsoft.Scripting.SourceCodeKind.Statements);            return source.Execute(scope);        }        public object Execute(string cmd, ScriptScope scope) {            return this.Execute(cmd, scope, _defaultEngine);        }        public object Execute(string cmd) {            return this.Execute(cmd, _defaultScope, _defaultEngine);        }        #endregion        #region 輸入輸出        public void Print(params object[] objs) {            foreach (object o in objs) {                Console.Write(o);            }        }        public void PrintLn(params object[] objs) {            foreach (object o in objs) {                Console.WriteLine(o);            }        }        #endregion    }}

執行Run1(), 發現我的目的達到了. 我的.net程式和指令碼實現了最簡單的互動.

下一篇預告:這樣寫很無聊,寫一個簡單的遊戲玩一下...用.net做UI和底層,用指令碼寫邏輯...