[IronPython] Embedding IronPython and calling python functions from C#

[Patrick van der Willik]

I'm a bit late with responding to this as I was kinda busy. I used the 
code that was given Stephen and it seems to run properly without 
throwing exceptions. However, I created a little autoexec.py file with a 
simple function in it with 2 parameters.

The main problem here is: How do I call the function through the scope? 
I used engine.CreateScope() to create myself a new scope, but from there 
on, I'm basically lost(again). What I basically want to do, is call my 
function 'add' with 2 parameters(say, 10 and 15). The modules itself are 
loaded into a ScriptSource.

Thanks,
Patrick

Lepisto, Stephen P wrote:
>
> What I do when I want to work with python modules from embedded 
> IronPython is set the IronPython search path with the path of the 
> module to load then  create and execute a small python script that 
> loads the main python modules into the current scope.
>
>  
>
> string moduleName = Path.GetFileName(modulePath);
>
> string path = Path.GetDirectoryName(modulePath);
>
>  
>
> ICollection<string> paths = _pythonEngine.GetSearchPaths();
>
> if (!paths.Contains(path))
>
> {
>
>     paths.Add(path);
>
>     _pythonEngine.SetSearchPaths(paths);
>
> }
>
> string modInvoke = String.Format("import {0}\nfrom {0} import *\n", 
> moduleName);
>
> ScriptSource source = 
> _pythonEngine.CreateScriptSourceFromString(modInvoke,
>
>          
>                                                         Microsoft.Scripting.SourceCodeKind.Statements);
>
>  
>
> Where modulePath is the full path to the python module or package to load.
>
>  
>
> I can then invoke methods or access attributes using the IronPython 
> scope.  In this way, I can interact with the python modules for as 
> long as necessary before closing down the scope/engine.
>
>  
>
>  
>
> *From:* users-bounces at lists.ironpython.com 
> [mailto:users-bounces at lists.ironpython.com] *On Behalf Of *Dody Gunawinata
> *Sent:* Thursday, June 11, 2009 9:09 AM
> *To:* Discussion of IronPython
> *Subject:* Re: [IronPython] Embedding IronPython and calling python 
> functions from C#
>
>  
>
> You can read all yours file scripts, then using StringBuilder to 
> combine then and call CreateScriptSourceFromString()
>
> Then you can call your functions within the combined scripts normally. 
> Pretty much you are creating a giant source code on the fly.
>
>  
>
> On Thu, Jun 11, 2009 at 5:32 PM, Patrick van der Willik 
> <patrick at toolmaker.nl <mailto:patrick at toolmaker.nl>> wrote:
>
> I'm currently attempting to embed the IronPython 2 runtimes into an 
> existing application written in C#. However, I find the amount of 
> documentation lacking on what I'm trying to do. I currently have a 
> proof-of-concept version which uses Lua and LuaInterface, but the 
> people who have to write the scripts dislike Lua(Well, more hate it 
> with a passion) and would love to see this working with Python.
>
> My host application is a networked application that must trigger 
> certain scripts functions on events generated by the connected 
> clients. The idea is that when my application starts, it will load the 
> IronPython script environment, launches an 'autoexec.py' which will 
> load various other scripts files and do some housekeeping. Once this 
> all is completed, it will start listening to incoming connections. 
> However, in various scenarios, the application has to trigger scripted 
> functions when data is received from a client. Which script function 
> is called is different per client and per event. I have events for 
> connecting, logging on, disconnecting and a set of data specific 
> events after receiving data. This highly depends on the received packets.
>
> My question here is: How do I embed IronPython in such a fashion that 
> I can load my scripts and then trigger various functions within that? 
> I've seen many examples that just call CreateScriptSourceFromString() 
> or File each time in which just 1 piece of code is implemented. This 
> is not suitable for the needs here because the scripted systems can 
> become quite complex.
>
> With regards,
> Patrick
>
>
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