Host Python In your Application with IronPython2.0.1 (一): 创建交互环境

上一次用了以前下载的IronPython 2.0 A1版, 今天下载了正式版2.0.1,发现变化不小啊...我过时了.

原有的代码已经不能正常运行, 于是在2.0.1正式版上再调整了一下.

using System;

using System.Collections.Generic;

using System.Text;

using IronPython.Hosting;

using IronPython.Runtime;

using Microsoft.Scripting;

using Microsoft.Scripting.Hosting;



namespace IPConsole {

    class Program {

        static void Main(string[] args) {

            /*

             * 方法一: 通过ScriptRuntimeSetup读取配置文件,加载动态语言引擎

            ScriptRuntimeSetup srs = ScriptRuntimeSetup.ReadConfiguration();

            ScriptRuntime runtime = new ScriptRuntime(srs);

            ScriptEngine engine = runtime.GetEngine("Python");

            *****/



            /*

             * 方法二:通过ScriptRuntime读取配置文件,加载引擎

            ScriptRuntime runtime = ScriptRuntime.CreateFromConfiguration();

            ScriptEngine engine = runtime.GetEngine("Python");

             * ***/



            /*

             * 方法三:直接创建引擎

             * ***/

            ScriptEngine engine = Python.CreateEngine();



            StringBuilder cmdBuff = new StringBuilder();

            string line = "";

            Console.WriteLine(string.Format("IronPython {0} ",  engine.LanguageVersion));  //print version



            ScriptScope scope = engine.CreateScope();

            //进入交互

            while (true) {

                if (cmdBuff.Length == 0) {

                    Console.Write(">>> ");  //first prompt

                }

                else {

                    Console.Write("... ");  //2nd and above prompt

                }



                //get command line

                line = Console.ReadLine();



                cmdBuff.AppendLine(line);



                if (line.StartsWith(" ") | line.StartsWith("\t") | line.EndsWith(":")){

                    //do nothing...get next input 

                }

                else {

                    //get the command and execute it

                    string cmd = cmdBuff.ToString();

                    try {

                        if (cmd.TrimEnd() == "quit") break;



                        //需要创建ScriptSource执行,InteractiveCode为交互环境

                        ScriptSource source = engine.CreateScriptSourceFromString(cmd, SourceCodeKind.InteractiveCode);

                        source.Execute(scope);

                    }

                    catch (Exception e) {

                        Console.WriteLine(e.Message);

                    }

                    //clear command buffer

                    cmdBuff.Length = 0; 

                }

            }

            Console.WriteLine("Quit");

        }

    }

}

在这里,创建引擎共有三种方式,其中前两种需要配置文件app.config配合, 如下:

<?xml version="1.0" encoding="utf-8" ?>

<configuration>

  <configSections>

    <section name="microsoft.scripting" type="Microsoft.Scripting.Hosting.Configuration.Section, Microsoft.Scripting" requirePermission="false" />

  </configSections>

  <microsoft.scripting>

    <languages>

      <language names="IronPython,Python,py"

                extensions=".py"

                displayName="IronPython 2.0.1"

                type="IronPython.Runtime.PythonContext,IronPython" />

      <!-- 可以添加其它引擎, 如IronRuby -->

    </languages>

  </microsoft.scripting>

</configuration>

再看一下测试结果吧, 比原来好了. 因为这个交互模式: 输入a也会显示a的值了,而不一定非要print

IronPython 2.0.0.0

>>> a=1

>>> a

1

>>> b=2

>>> b

2

>>> a==b

False

>>> def hello(name):

...     print "hello %s" % name

...

>>> hello('hydonlee')

hello hydonlee

>>> quit

Quit

以后的工作将在2.0.1正式版上进行.不过, 我没有找到api文档?alpha版都有,为什么正式版没有了?