[IronPython] Using IronPython as an assembly in dotNET

[Lukas Dubeda]

Thanks again,

I'll dig into the documentation and see if I can come up with a solution.

As for "generics", since I have no idea what these are and I know 
MAXScript quite well, I assume they really don't exist in this language.

MXS is a very simple, focused, language that only works within 3ds Max. 
It wasn't intented for such broad use as Python for example.

Cheers,

- Lukas

Dino Viehland wrote:
> There's documentation on the hosting APIs over here:
> 
> http://dlr.codeplex.com/Wiki/View.aspx?title=Docs%20and%20specs
> 
> But basically you want to do:
> 
> scope = engine.CreateScope()
> scope.SetVariable("my_object_model", new MyObjectModel())
> engine.Execute("print my_object_model.SomeCall()", scope)
> 
> As a workaround for Execute you can call ExecuteAndWrap which
> doesn't have a generic overload.  You'll just need to call
> .Unwrap() on the resulting value to get the real object back.
> 
> A quick search seems to indicate that MaxScript 9 doesn't
> support generics.  I have no clue what the latest version is
> though so I'm not sure how relevant that was (it was from 2006).
> 
>> -----Original Message-----
>> From: users-bounces at lists.ironpython.com [mailto:users-
>> bounces at lists.ironpython.com] On Behalf Of Lukas Dubeda
>> Sent: Thursday, August 13, 2009 10:42 AM
>> To: Discussion of IronPython
>> Subject: Re: [IronPython] Using IronPython as an assembly in dotNET
>>
>> Hey, thanks Dino,
>>
>> some interesting points. However, I'm not a programmer, I'm more of a
>> "scripter" so all I'm familiar with is Python and MAXScript (native 3ds
>> Max scripting language).
>>
>> I have no idea how to access the generic/non-generic engine, further
>> more, I have no idea what the difference is.
>>
>> As for scope, I can do that, the problem is, I have no idea how exactly
>> to do that. Is there a documentation on this subject somewhere?
>>
>> Thanks a lot for the tips, I appretiate it.
>>
>> - Lukas
>>
>> Dino Viehland wrote:
>>> What language are you doing this from?
>>>
>>> ScriptEngine.Execute has an overload which is generic and an overload
>>> which is not generic.  The generic version will get the result and
>>> convert it to the provided generic type.  It looks like for some
>> reason
>>> you end up trying to call the generic version here.  Does the
>> language
>>> have support for generics?  If so you could do:
>>>
>>> engine.Execute<object>(...) (C# syntax)
>>>
>>> which would be the same as the non-generic version.
>>>
>>> For communication I'd suggest injecting a class into the ScriptScope
>>> You execute the code in.  Then the Python code can call back on it or
>>> subscribe to events on it.
>>>
>>>
>>>> -----Original Message-----
>>>> From: users-bounces at lists.ironpython.com [mailto:users-
>>>> bounces at lists.ironpython.com] On Behalf Of Lukas Dubeda
>>>> Sent: Thursday, August 13, 2009 10:15 AM
>>>> To: users at lists.ironpython.com
>>>> Subject: [IronPython] Using IronPython as an assembly in dotNET
>>>>
>>>> Hi there everyone,
>>>>
>>>> I have a problem I can't seem to figure out.
>>>>
>>>> I want to use IronPython as an assembly via dotNET, I managed to
>> load
>>>> it
>>>> as an assembly and access various constructors, classes etc...
>>>>
>>>> However, I have a problem with executing Python code from the host
>>>> application. I'm using 3ds Max to load up the assembly via dotNET.
>> The
>>>> code looks like this:
>>>>
>>>> Assembly = dotNetClass "System.Reflection.Assembly" -- loading the
>>>> assembly class
>>>> Assembly.LoadFrom "C:\IronPython-2.0.1\IronPython.dll" -- loading
>>>> IronPython
>>>>
>>>> ironPythonHosting = dotNetClass "IronPython.Hosting.Python" --
>> loading
>>>> the hosting class
>>>> pythonEngine = ironPythonHosting.CreateEngine() -- creating an
>> engine
>>>> Now, when I execute:
>>>>
>>>> pythonEngine.ExecuteFile("C:\\tst.py")
>>>>
>>>> it runs smoothly and executes the tst.py and whatever Python code
>>>> that's
>>>> inside.
>>>>
>>>> Now, I want to execute the code directly, not via a saved file. I
>> tried
>>>> this:
>>>>
>>>> pythonEngine.Execute("print 'TEST'")
>>>>
>>>> but it throws me an error:
>>>>
>>>> -- Error occurred in anonymous codeblock; filename: ; position: 344
>>>> -- Runtime error: dotNet runtime exception: Late bound operations
>>>> cannot
>>>> be performed on types or methods for which ContainsGenericParameters
>> is
>>>> true.
>>>>
>>>> Also, if I execute the Python code inside a file, is there a way to
>> get
>>>> the result/feedback from the code back to the host application? Via
>>>> dotNET or IronPython? Or anyhow? So that I can write more complex
>> tools
>>>> that'd communicate with Pyhon code from within 3ds Max.
>>>>
>>>> Thanks a lot in advance, cheers,
>>>>
>>>> - Lukas Dubeda
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