Fabien Meghazi wrote:
> How can I execute some python code that I have in a String() from a C#
> .NET
> program or an aspx application ?
> I also would like to get back the stdout that the python code
produced.
You want to use IronPython.Hosting.PythonEngine. Here's a simple
example program. We're very interested in feedback on experiences with
hosting IronPython from other .NET languages as that's an important
scenario, but not one that I have much personal experience with.
Does this give you what you're looking for? - Jim
----------------------------------------------
using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using IronPython.Hosting;
namespace HostingDemo {
class Program {
static void Main(string[] args) {
PythonEngine engine = new PythonEngine();
// evaluating a Python expression to get an object back
string expr = "2+2";
Console.WriteLine("{0} = {1}", expr, engine.Evaluate(expr));
// executing a chunk of Python code
string stmt = "for i in range(6):\n\tprint '***'*(i+1)";
engine.Execute(stmt);
// exposing variables to Python code
Program p = new Program();
engine.SetVariable("app", p);
string s =
(string)engine.Evaluate("app.GetImportantString()");
Debug.Assert(s == p.GetImportantString());
// capturing stdout - this should be much cleaner
// using code outside of IronPython.Hosting will be much
less
// stable than code inside of IronPython.Hosting
OutputCollector output = new OutputCollector();
IronPython.Modules.sys.stdout = output;
engine.Execute(stmt);
string result = output.buffer.ToString();
Console.WriteLine("got string of length {0}",
result.Length);
Console.WriteLine(IronPython.Objects.StringOps.Quote(result));
}
public string GetImportantString() {
return "ni";
}
// A quick hack, not the ideal framework design
class OutputCollector {
public StringBuilder buffer = new StringBuilder();
public bool softspace = false; // weird Python print feature
public void write(string data) {
buffer.Append(data);
}
}
}
}
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