Re: [IronPython] Need help using IronPython from C#
On Aug 11, 2006, at 5:32 PM, Dino Viehland wrote:
You're quickly getting into the guts of the runtime, so you'll find
most of what you want over in Ops.
To get an attribute off of an object you can do TryGetAttr(object
o, SymbolId name, out object ret). o would be your ls, SymbolId's
our what we use internally to represent attributes - you can get
one by doing SymbolTable.SymbolToId(foo), and then we'll pass you
out the value.
As you get the values back you'd need to re-create delegates to
them. Note if you're re-creating delegates of the same type we
won't need to do any additional code gen work - we'll just bind the
new object back to the existing method we created, so this
shouldn't be too nasty to do. If you're getting a property we'll
return the property value from Ops.GetAttr (basically if you hit a
descriptor we will run the descriptor code for you). And if you're
getting some plain old attribute back out then you can do whatever
you want w/ the value from there.
Ah. Thanks. This is what I needed. So to make a C# wrapper for a
Python class I should do something like...
class LogViewerService
{
public delegate int GetNumberOfEntriesDelegate();
public GetNumberOfEntriesDelegate GetNumberOfEntries;
public delegate object GetEntryDelegate(int entryNumber);
public GetEntryDelegate GetEntry;
public delegate void closeDelegate();
public closeDelegate close;
public LogViewerService(object pythonObject)
{
object method;
IronPython.Runtime.Operations.Ops.TryGetAttr
(pythonObject, IronPython.Runtime.SymbolTable.StringToId
(GetNumberOfEntries), out method);
GetNumberOfEntries = (GetNumberOfEntriesDelegate)
IronPython.Runtime.Operations.Ops.GetDelegate(method, typeof
(GetNumberOfEntriesDelegate));
IronPython.Runtime.Operations.Ops.TryGetAttr
(pythonObject, IronPython.Runtime.SymbolTable.StringToId(GetEntry),
out method);
GetEntry = (GetEntryDelegate)
IronPython.Runtime.Operations.Ops.GetDelegate(method, typeof
(GetEntryDelegate));
IronPython.Runtime.Operations.Ops.TryGetAttr
(pythonObject, IronPython.Runtime.SymbolTable.StringToId(close),
out method);
close = (closeDelegate)
IronPython.Runtime.Operations.Ops.GetDelegate(method, typeof
(closeDelegate));
}
}
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Re: [IronPython] Need help using IronPython from C#
On Aug 11, 2006, at 3:53 PM, Dino Viehland wrote: If you really do want to get a delegate to a Python function that came from a module you might want to look at Ops.GetDelegate. If you were to create a module, execute its contents, and then get the method back out by name as an object you could pass the method to Ops.GetDelegate w/ a delegate type and create a delegate to the raw Python method that you could call from C#. I think this is closer to what I want. I'm looking for clean way to expose an API written in Python to a C# program. So I can do MyDelegate ConnectToService = (MyDelegate) IronPython.Runtime.Operations.Ops.GetDelegate(e.Evaluate (RemoteAdmin.ConnectToService), typeof(MyDelegate)); and then... object ls = ConnectToService(localhost,LogViewer); but now how do I get to the methods and attributes of ls? -Original Message- From: [EMAIL PROTECTED] [mailto:users- [EMAIL PROTECTED] On Behalf Of Jason Ferrara Sent: Friday, August 11, 2006 12:08 PM To: Discussion of IronPython Subject: [IronPython] Need help using IronPython from C# I'd like to do the equivalent of something like... import RemoteAdmin ls = RemoteAdmin.ConnectToService(localhost,LogViewer) numEntries = ls.GetNumberOfEntries() e = ls.GetEntry(numEntries - 1) entryString = str(e) in C#. So I get as far as PythonEngine e = new PythonEngine(); # The RemoteAdmin module is in an assembly built using IronPython.Hosting.Compiler and then referenced by the C# project ClrModule clr = (ClrModule) e.Import(clr); clr.AddReference(typeof(RemoteAdmin).Assembly) e.Import(RemoteAdmin); and then I'm lost. Is there a way to make a delegate from a method that exists in the PythonEngine environment and then call the delegate from C#? I'm aware of the Evaluate and Execute methods of PythonEngine, but I'm looking for a more direct way to call the python methods and access python object attributes, rather than building up strings to pass to Evaluate. Thanks - Jason ___ users mailing list users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com ___ users mailing list users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com ___ users mailing list users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
Re: [IronPython] Need help using IronPython from C#
You're quickly getting into the guts of the runtime, so you'll find most of what you want over in Ops. To get an attribute off of an object you can do TryGetAttr(object o, SymbolId name, out object ret). o would be your ls, SymbolId's our what we use internally to represent attributes - you can get one by doing SymbolTable.SymbolToId(foo), and then we'll pass you out the value. As you get the values back you'd need to re-create delegates to them. Note if you're re-creating delegates of the same type we won't need to do any additional code gen work - we'll just bind the new object back to the existing method we created, so this shouldn't be too nasty to do. If you're getting a property we'll return the property value from Ops.GetAttr (basically if you hit a descriptor we will run the descriptor code for you). And if you're getting some plain old attribute back out then you can do whatever you want w/ the value from there. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jason Ferrara Sent: Friday, August 11, 2006 1:29 PM To: Discussion of IronPython Subject: Re: [IronPython] Need help using IronPython from C# On Aug 11, 2006, at 3:53 PM, Dino Viehland wrote: If you really do want to get a delegate to a Python function that came from a module you might want to look at Ops.GetDelegate. If you were to create a module, execute its contents, and then get the method back out by name as an object you could pass the method to Ops.GetDelegate w/ a delegate type and create a delegate to the raw Python method that you could call from C#. I think this is closer to what I want. I'm looking for clean way to expose an API written in Python to a C# program. So I can do MyDelegate ConnectToService = (MyDelegate) IronPython.Runtime.Operations.Ops.GetDelegate(e.Evaluate (RemoteAdmin.ConnectToService), typeof(MyDelegate)); and then... object ls = ConnectToService(localhost,LogViewer); but now how do I get to the methods and attributes of ls? -Original Message- From: [EMAIL PROTECTED] [mailto:users- [EMAIL PROTECTED] On Behalf Of Jason Ferrara Sent: Friday, August 11, 2006 12:08 PM To: Discussion of IronPython Subject: [IronPython] Need help using IronPython from C# I'd like to do the equivalent of something like... import RemoteAdmin ls = RemoteAdmin.ConnectToService(localhost,LogViewer) numEntries = ls.GetNumberOfEntries() e = ls.GetEntry(numEntries - 1) entryString = str(e) in C#. So I get as far as PythonEngine e = new PythonEngine(); # The RemoteAdmin module is in an assembly built using IronPython.Hosting.Compiler and then referenced by the C# project ClrModule clr = (ClrModule) e.Import(clr); clr.AddReference(typeof(RemoteAdmin).Assembly) e.Import(RemoteAdmin); and then I'm lost. Is there a way to make a delegate from a method that exists in the PythonEngine environment and then call the delegate from C#? I'm aware of the Evaluate and Execute methods of PythonEngine, but I'm looking for a more direct way to call the python methods and access python object attributes, rather than building up strings to pass to Evaluate. Thanks - Jason ___ users mailing list users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com ___ users mailing list users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com ___ users mailing list users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com ___ users mailing list users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
