[IronPython] hosting and SetVariable

Slide slide.o.mix at gmail.com
Fri May 30 00:50:41 CEST 2008 

Works like a charm, thanks!

On Thu, May 29, 2008 at 2:50 PM, Dino Viehland
<dinov at exchange.microsoft.com> wrote:
> I'd just use ObjectOperations for this one - that should be as simple as:
>
> engine.Operations.Call(type);
>
> and pass any arguments you want.
>
> -----Original Message-----
> From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Slide
> Sent: Thursday, May 29, 2008 2:42 PM
> To: Discussion of IronPython
> Subject: Re: [IronPython] hosting and SetVariable
>
> Dino,
>
> Thanks for all the help, it has helped me move forward quite a bit! It
> turns out I had an error in the python that was being covered up by
> the way I was doing some things. I fixed that and am left with one
> last question. Given a PythonType, it looks like there are a bunch of
> different ways to create an instance through __new__ calls. My
> question is, where do I get the CodeContext from? I know I can create
> a new one using "new," but it requires a Scope object, which I don't
> have HostingHelpers to get from a ScriptScope. So, can you give me a
> quick example of creating an instance if I have a PythonType?
> Something that will hopefully be useful going forward as well :-)
>
> Thanks!
>
> slide
>
> On Thu, May 29, 2008 at 1:22 PM, Dino Viehland
> <dinov at exchange.microsoft.com> wrote:
>> There's something strange going on.  This small program on 2.0B2:
>>
>> using System;
>> using System.Collections.Generic;
>> using System.Reflection;
>>
>> using Microsoft.Scripting;
>> using Microsoft.Scripting.Hosting;
>>
>> class Test {
>>    public static void Main(string[]args) {
>>        ScriptRuntime runtime = ScriptRuntime.Create();
>>        runtime.Globals.ClearVariables();
>>        ScriptEngine engine = runtime.GetEngine("py");
>>        CompiledCode code = engine.CreateScriptSourceFromFile("test.py").Compile();
>>        ScriptScope scope = code.MakeOptimizedScope();
>>        code.Execute(scope);
>>        foreach(KeyValuePair<string, object> kvp in scope.Items) {
>>            Console.WriteLine("{0} {1}", kvp.Key, kvp.Value);
>>        }
>>    }
>> }
>>
>> With test.py containing:
>>
>> class x(object): pass
>>
>> prints:
>>
>> __builtins__ IronPython.Runtime.PythonDictionary
>> x IronPython.Runtime.Types.PythonType
>>
>> I'm not sure what the difference would be off the top of my head as that's basically what you're doing minus the additional setup.  Can you try reducing some of the additional steps and seeing if you can get a basic type to show up?
>>
>> -----Original Message-----
>> From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Slide
>> Sent: Thursday, May 29, 2008 12:52 PM
>> To: Discussion of IronPython
>> Subject: Re: [IronPython] hosting and SetVariable
>>
>> ScriptScope.Item doesn't have my class definition in there. Perhaps I
>> am not doing the initial setup correctly.
>>
>>
>>                    _runtime.Globals.ClearVariables();
>>
>>                    _engine = _runtime.GetEngine("py");
>>
>>                    foreach (KeyValuePair<string, object> obj in _objects)
>>                        _runtime.Globals.SetVariable(obj.Key, obj.Value);
>>
>>                    _error_listener = new ScriptErrorListener();
>>
>>                    // setup the paths to search for modules
>>                    List<string> paths = new List<string>();
>>                    paths.Add(Environment.CurrentDirectory);
>>
>> paths.Add(Path.Combine(Environment.CurrentDirectory, "Lib"));
>>                    paths.Add(Path.GetDirectoryName(path));
>>
>>                    string[] probe_paths =
>> Directory.GetDirectories(Path.GetDirectoryName(Assembly.GetEntryAssembly().Location));
>>                    paths.AddRange(probe_paths);
>>
>>                    _engine.SetScriptSourceSearchPaths(paths.ToArray());
>>
>>                    CompiledCode code =
>> _engine.CreateScriptSourceFromFile(path).Compile(_error_listener);
>>                    _scope = code.MakeOptimizedScope();
>>                    code.Execute(_scope);
>>                    _engine.PublishModule("__main__", _scope);
>>
>>                    // add all the references the "Host" wanted.
>>                    foreach (string assembly in _assemblies)
>>                        _runtime.LoadAssembly(Assembly.LoadFrom(assembly));
>>
>>
>> The code I am passing in contains the following:
>>
>> import ScriptTester
>>
>> class MyClass(ScriptTester.ITest):
>>    def DoIt(self, msg):
>>        print msg
>>
>> When I iterate over _scope.Items, I don't see "MyClass" in the list of items.
>>
>> Thanks
>>
>> On Thu, May 29, 2008 at 12:46 PM, Dino Viehland
>> <dinov at exchange.microsoft.com> wrote:
>>> Sorry, I didn't realize that was a recent addition.  Can you just iterate over ScriptScope.Items - I checked and it's there in B2 :).
>>>
>>> As for beta 3 the plan is sometime in June.
>>>
>>>
>>> -----Original Message-----
>>> From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Slide
>>> Sent: Thursday, May 29, 2008 12:39 PM
>>> To: Discussion of IronPython
>>> Subject: Re: [IronPython] hosting and SetVariable
>>>
>>> That class is not available in Beta2. I also downloaded the latest
>>> source and checked the implementation of GetScope, it calls
>>> ScriptScope.Scope, which also doesn't exist in Beta2. Is Beta3 with
>>> all this stuff coming out soon?
>>>
>>> thanks
>>>
>>> On Thu, May 29, 2008 at 12:17 PM, Seshadri Pillailokam Vijayaraghavan
>>> <seshapv at microsoft.com> wrote:
>>>> It's fully qualified path is (Runtime\)'Microsoft.Scripting.Hosting.HostingHelpers'
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Slide
>>>> Sent: Thursday, May 29, 2008 12:13 PM
>>>> To: Discussion of IronPython
>>>> Subject: Re: [IronPython] hosting and SetVariable
>>>>
>>>> It may be able to be accomplished with ObjectOperations. What I am
>>>> trying to do is find all the types defined in my ScriptScope and
>>>> determine if they are subclasses (or implementers) of another type. I
>>>> used to do this using the PythonType class with UnderlyingSystemType
>>>> and so forth, but all that stuff is gone in the beta 2 I downloaded.
>>>> Also, I didn't see HostingHelpers.GetScope anywhere, is this from an
>>>> external library (I checked Microsoft.Scripting,
>>>> Microsoft.Scripting.Core and the IronPython assemblies)
>>>>
>>>> On Thu, May 29, 2008 at 11:56 AM, Dino Viehland
>>>> <dinov at exchange.microsoft.com> wrote:
>>>>> Unfortunately there isn't any specific documentation.  Can what you used to do be accomplished with the ObjectOperations class?
>>>>>
>>>>> Otherwise there's a HostingHelpers.GetScope which you could use to get a Scope from a ScriptScope and you can probably re-use your old magic.
>>>>>
>>>>> -----Original Message-----
>>>>> From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Slide
>>>>> Sent: Thursday, May 29, 2008 11:34 AM
>>>>> To: Discussion of IronPython
>>>>> Subject: Re: [IronPython] hosting and SetVariable
>>>>>
>>>>> Thanks that will be helpful. Is there any documentation specific to
>>>>> IronPython? I would like to do some introspection on modules and such
>>>>> (to retrieve types defined in the module and so forth) and I used to
>>>>> do that with some PythonType magic which doesn't seem to work anymore
>>>>> (ScriptScope is not convertable to Scope when calling Get__dict__).
>>>>>
>>>>> Thanks again!
>>>>>
>>>>> On Thu, May 29, 2008 at 10:11 AM, Seshadri Pillailokam Vijayaraghavan
>>>>> <seshapv at microsoft.com> wrote:
>>>>>> The latest Hosting API Spec is available at http://compilerlab.members.winisp.net/.
>>>>>> It's available as both doc (http://compilerlab.members.winisp.net/dlr-spec-hosting.doc) or PDF (http://compilerlab.members.winisp.net/dlr-spec-hosting.pdf).
>>>>>>
>>>>>> Thanks
>>>>>> Sesh
>>>>>> -----Original Message-----
>>>>>> From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Slide
>>>>>> Sent: Thursday, May 29, 2008 8:42 AM
>>>>>> To: Discussion of IronPython
>>>>>> Subject: Re: [IronPython] hosting and SetVariable
>>>>>>
>>>>>> Apparently I need to update to the latest IP2.0 beta. I don't even see
>>>>>> CurrentManager.Globals, thanks for the info.
>>>>>>
>>>>>> On Thu, May 29, 2008 at 8:37 AM, Dino Viehland
>>>>>> <dinov at exchange.microsoft.com> wrote:
>>>>>>> What you want to do is put the variables in ScriptDomainManager.Globals/ScriptRuntime.Globals and then you can import them.  For example:
>>>>>>>
>>>>>>> ScriptDomainManager.CurrentManager.Globals.SetVariable("hello_world", "hi!");
>>>>>>>
>>>>>>> Then you can do:
>>>>>>>
>>>>>>> import hello_world
>>>>>>>
>>>>>>> and we'll pick it up from globals.  Just FYI IronPython.Hosting.PythonEngine is going away (along w/ CurrentEngine) so you're better off creating a ScriptRuntime and getting a ScriptEngine from it by name.
>>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Slide
>>>>>>> Sent: Thursday, May 29, 2008 8:14 AM
>>>>>>> To: Discussion of IronPython
>>>>>>> Subject: [IronPython] hosting and SetVariable
>>>>>>>
>>>>>>> Perhaps this is just missing knowledge on my part, but here goes.
>>>>>>>
>>>>>>> I am using IP2.0 with the hosting API to add scripting support to my
>>>>>>> application. I use the following code to create my main module from
>>>>>>> the script file the user selects:
>>>>>>>
>>>>>>>  ICompiledCode code =
>>>>>>> IronPython.Hosting.PythonEngine.CurrentEngine.Compile(SourceUnit.CreateFileUnit(_context,
>>>>>>> path), _error_sink);
>>>>>>> __main__ = code.MakeModule("__main__") as ScriptScope;
>>>>>>>
>>>>>>> // create our module.
>>>>>>> ScriptDomainManager.CurrentManager.PublishModule(__main__, "__main__");
>>>>>>>
>>>>>>> // add all the references the "Host" wanted.
>>>>>>> foreach (string assembly in _assemblies)
>>>>>>>      Microsoft.Scripting.ClrModule.GetInstance().AddReference(Path.GetFileNameWithoutExtension(assembly));
>>>>>>>
>>>>>>> // set all the variables that the "Host" wanted set.
>>>>>>> foreach (KeyValuePair<string, object> obj in _objects)
>>>>>>>      __main__.SetVariable(obj.Key, obj.Value);
>>>>>>>
>>>>>>> The last foreach is setting up my object model which is available to
>>>>>>> my scripts. My problem arises when I want to use one of these
>>>>>>> variables from a script that is imported from the user selected script
>>>>>>> file.
>>>>>>>
>>>>>>> For instance, if I add an object _objects.Add("MyObj", someObj), I can
>>>>>>> reference that object in the user script as MyObj with no problem.
>>>>>>> What I would like to do is have these variables global to all scripts
>>>>>>> that are imported, etc. I tried import __main__ in my other scripts,
>>>>>>> but __main__ doesn't show up in sys.modules (which is what I thought
>>>>>>> PublishModule would do, but thats a different story).
>>>>>>>
>>>>>>> Am I going about this the wrong way?
>>>>>>>
>>>>>>> Thanks
>>>>>>>
>>>>>>> slide
>>>>>>>
>>>>>>> --
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>>>>>>> http://slide-o-blog.blogspot.com/
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>>>>>>>
>>>>>>
>>>>>>
>>>>>>
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>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
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>>>>>
>>>>
>>>>
>>>>
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>>>
>>>
>>>
>>> --
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>>>
>>
>>
>>
>> --
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>> http://slide-o-blog.blogspot.com/
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>>
>
>
>
> --
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> http://slide-o-blog.blogspot.com/
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