IronPython的DLR;将参数传递给编译code？ [英] IronPython DLR; passing parameters to compiled code?

问题描述

我目前在做下面的创建和执行一个简单的Python计算，采用DLR：

  ScriptRuntime运行时间= Python.CreateRuntime（）;
的ScriptEngine引擎= runtime.GetEngine（PY）;

MemoryStream的毫秒=新的MemoryStream（）;
runtime.IO.SetOutput（MS，新的StreamWriter（MS））;

ScriptSource SS = engine.CreateScriptSourceFromString（打印1 + 1，源$ C ​​$ cKind.Interactive code）;

编译code CC = ss.Compile（）;
cc.Execute（）;

INT长度=（INT）ms.Length;
字节[]字节=新字节[长度];
ms.Seek（0，SeekOrigin.Begin）;
ms.Read（字节，0，（int）的ms.Length）;
。字符串结果= Encoding.GetEncoding（UTF-8）的GetString（字节，0，（int）的ms.Length）;

Console.WriteLine（结果）;
 

它打印2到控制台，但;

我想获得的1 + 1的结果，而不必进行打印（如，这似乎是一个昂贵的操作）。什么我给你cc.Execute的结果（）来为空。有没有其他方法可以让我得到执行（结果变量）？

我也试图找到一种方法来传递参数，即这样的结果是ARG1 + ARG2，而且不知道该怎么做;唯一的其他重载执行需要ScriptScope作为参数，我从来没有使用过蟒蛇。任何人都可以帮忙吗？

回答这两个问题：（德斯科的接受为我指出了正确的方向）

 的ScriptEngine PY = Python.CreateEngine（）;
ScriptScope PYS = py.CreateScope（）;

ScriptSource SRC = py.CreateScriptSourceFromString（A + B）;
编译= src.Compile编译code（）;

pys.SetVariable（一，1）;
pys.SetVariable（b的，1）;
VAR的结果= compiled.Execute（PYS）;

Console.WriteLine（结果）;
 

解决方案

您可以评估EX pression Python和返回其结果（1）或范围将值分配给某个变量，后来捡起来（2）

  VAR PY = Python.CreateEngine（）;

    // 1
    变种值= py.Execute（1 + 1）;
    Console.WriteLine（值）;

    // 2
    变种scriptScope = py.CreateScope（）;
    py.Execute（一个= 1 + 1，scriptScope）;
    变种值2 = scriptScope.GetVariable（一）;
    Console.WriteLine（值2）;
 

I'm currently doing the following to create and execute a simple python calculation, using DLR:

ScriptRuntime runtime = Python.CreateRuntime();
ScriptEngine engine = runtime.GetEngine("py");

MemoryStream ms = new MemoryStream();
runtime.IO.SetOutput(ms, new StreamWriter(ms));

ScriptSource ss = engine.CreateScriptSourceFromString("print 1+1", SourceCodeKind.InteractiveCode);

CompiledCode cc = ss.Compile();
cc.Execute();

int length = (int)ms.Length;
Byte[] bytes = new Byte[length];
ms.Seek(0, SeekOrigin.Begin);
ms.Read(bytes, 0, (int)ms.Length);
string result = Encoding.GetEncoding("utf-8").GetString(bytes, 0, (int)ms.Length);

Console.WriteLine(result);

Which prints '2' to the console, but;

I want to get the result of 1 + 1 without having to print it (as that seems to be a costly operation). Anything I assign the result of cc.Execute() to is null. Is there any other way I can get the resulting variables from Execute()?

I am also trying to find a way to pass in parameters, i.e. so the result is arg1 + arg2 and have no idea how to do that; the only other overload for Execute takes ScriptScope as a parameter, and I've never used python before. Can anyone help?

[Edit] The answer to both questions: (Desco's accepted as pointed me in the right direction)

ScriptEngine py = Python.CreateEngine();
ScriptScope pys = py.CreateScope();

ScriptSource src = py.CreateScriptSourceFromString("a+b");
CompiledCode compiled = src.Compile();

pys.SetVariable("a", 1);
pys.SetVariable("b", 1);
var result = compiled.Execute(pys);

Console.WriteLine(result);

解决方案

You can either evaluate expression in Python and return its result (1) or assign value to some variable in scope and later pick it (2):

    var py = Python.CreateEngine();

    // 1
    var value = py.Execute("1+1");
    Console.WriteLine(value);

    // 2
    var scriptScope = py.CreateScope();
    py.Execute("a = 1 + 1", scriptScope);
    var value2 = scriptScope.GetVariable("a");
    Console.WriteLine(value2);

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