[IronPython] Modules in hosted enviroment

[Ross Hammermeister]

    You are correct about what I'm trying to do, sorry if wrote it in a way 
that was hard to understand. The project I'm working on this for is a 2-D 
game engine. I plan on calling python functions from C# with the relevant 
class (say on a collision with the colliding objects as parameters) but if 
extra data is needed about other items it can retrieve the list of them and 
these python function will need to execute quickly.
    With modules I can make different ways to access the wrapper classes I 
have made because in have the internal structure and can retrieve smaller 
sets based off whet the script calls and it won't need to pick through it or 
if it does the set would not be as big.
    I also want to maintain backwards compatibility as I add more 
functionality and if I set variables I worried about a script already using 
the variable and I use one class it would probably have a very large 
hierarchy or lots of unrelated functions which I want to avoid  passing into 
python.

An unrelated issue I have with ScriptScope is I can't figure out to add 
overloaded functions with different parameter counts for defaults I'm using 
3.5 if it matters.

Thanks
Ross


--------------------------------------------------
From: "Jeff Hardy" <jdhardy at gmail.com>
Sent: Tuesday, June 22, 2010 11:26 AM
To: "Discussion of IronPython" <users at lists.ironpython.com>
Subject: Re: [IronPython] Modules in hosted enviroment

> Hi Ross,
> Sorry if I'm being dense, but here's how I understand what you're doing:
>
> - you're hosting IronPython in some program X
> - X will generate data D and somehow feed D to Python script Y
> - Y will transform or process D in some way
>
> What you're looking for is the best way to get D into Y, correct?
>
> I think creating a module is the wrong way to go about this; modules
> are supposed to contain code and constant data, as the IronPython
> engine will only load them once and share them.
>
> Why is setting a variable for the Python script to use not suitable?
> If it needs to be a complex object, you can create a (non-static)
> class in C#, fill it out, and pass an instance to the Python script
> using ScriptScope.SetVariable.
>
> - Jeff
>
> On Tue, Jun 22, 2010 at 8:41 AM, Ross Hammermeister <glitch17 at gmail.com> 
> wrote:
>> My program creates data for a python script to use and I though the best 
>> way
>> for it get access to this was with modules. Simply setting a variable in 
>> the
>> script would not work because of the complexity of the data. Using the 
>> clr
>> module will not get access to the existing data (I also do not want to 
>> grant
>> access to all the other libraries). So I am left with creating a module 
>> but
>> using a static class and assigning all the instances to the static 
>> classes
>> every time before I call the python script is not a great method but I'm
>> thinking this would be the best at this point. The other method I found 
>> was
>> using the IronPython.Runtime.PythonModule class and Creating an instance 
>> for
>> each of my modules and adding to using
>> PythonEngine.Runtime.Globals.SetVariable The procedure to do this doesn't
>> give the impression that what I'm doing was ever intended and I have hit
>> things that I cannot do using this method. So I'm looking for a good 
>> method
>> of creating modules that would have my data attached to them.
>>
>> Thanks
>> Ross
>>
>> --------------------------------------------------
>> From: "Jeff Hardy" <jdhardy at gmail.com>
>> Sent: Monday, June 21, 2010 11:24 AM
>> To: "Discussion of IronPython" <users at lists.ironpython.com>
>> Subject: Re: [IronPython] Modules in hosted enviroment
>>
>>> On Sat, Jun 19, 2010 at 10:51 PM, Ross Hammermeister 
>>> <glitch17 at gmail.com>
>>> wrote:
>>>>
>>>> I have a project where I am hosting IronPython and I was wondering what
>>>> is
>>>> the best way to create modules in C# for python to use. I have found 
>>>> two
>>>> ways to do it so far. One method is what is done in IronPython, where
>>>> static
>>>> classes and the PythonModule attribute are used but I don't want to use
>>>> static classes to access runtime data.
>>>
>>> I'm not 100% sure what you mean here, but the static class is just a
>>> container - and it can contain non-static classes (and functions, and
>>> static variables, etc). If it needs to be a module, it's the way to
>>> go, as far as I'm concerned. If things get too big, don't forget that
>>> you can use partial classes to split things up.
>>>
>>> However, depending on what your code does, you probably don't need to
>>> make it a module - IronPython will work just fine with any .NET class
>>> library. Just do a `clr.AddReference` and then import the classes.
>>>
>>> - Jeff
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