Hosted IronPython: import files which contain custom functions

问题

Situation

Hosted IronPython allows developers to set parameters into script. Every time when a IPy engine object is created, I set such a parameter (ParamName), but when I try to import python module, in which my custom parameter is used, I get an exception with message "global name 'ParamName' is not defined".

Code sample

class PythonScriptingEngine
{
    private ScriptEngine pyEngine;
    private ScriptScope pyScope;

    public PythonScriptingEngine()
    {
        pyEngine = Python.CreateEngine();
        pyScope = pyEngine.CreateScope();
    }

    public object Run(string script)
    {
        ScriptSource source = pyEngine.CreateScriptSourceFromString(script);
        CompiledCode compiled = source.Compile();
        return compiled.Execute(pyScope);
    }

    public void SetParameter(string name, int value)
    {
        pyScope.SetVariable(name, value);
    }
}

// execution
var engine = new PythonScriptingEngine();
engine.SetParameter("ParamName", 10);
engine.Run(@"import SampleScriptWithParamName");

Question

Is there any workaround to this situation? How can I import python script in which custom parameter is used?

回答1:

As Simon pointed out, the issue is that ParamName is not in scope for SampleScriptWithParamName. One way to achieve that is to add it to the set of builtin variables like so:

public void SetParameter(string name, int value)
{
    pyEngine.GetBuiltinModule().SetVariable(name, value);
}

This should make it available everywhere, but I don't have the ability to test it right now.

来源：https://stackoverflow.com/questions/13874688/hosted-ironpython-import-files-which-contain-custom-functions

标签

ironpython