[IronPython] Transparent import of dlls?
Hi, I have some questions that may seem stupid, but I did not find the right answers yet. So simple pointers to the correct google query are as welcome as elaborate Howtos. J For cPython, it is possible to compile a module into a .pyc file. If this file resides in sys.path, it is transparently used instead of the .py source file. (We can ignore the exact details of lookup and version dependency here.) For IronPython, there is the pyc.py compiler script. This allows a python module to be precompiled into a .NET dll. However, it seems that it is not used transparently when placed in a directory in sys.path, one has to explicitly add a Reference to the dll (via clr.AddReference or hosting API). Now my questions: Is there any way to make this work transparently? (e. G. via a Flag to the interpreter, or a modified import() function, or renaming the .dll to .pyc?) Is there a way to extend this mechanism to python modules created in C#? (Creating a foo.dll that contains a foo module created via PythonModuleAttribute, similar to the way the modules in Ironpython.Modules.dll are created). We're currently using IronPytho 2.6 in a hosted .NET 2 environment. Thanks a lot, Regards, Markus ___ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
[IronPython] IronLanguages
Hello,
this question is not 100% targeted at IronPython, but I didn't know a
better list to write to.
I've started writing a C# - javascript bridge. Unlike IronPython and
IronRuby I don't want to write a javascript engine in .net, but rather use
existing ones. I can already access C# classes from javascript and
instance them. The opposite way turns out to be much harder for non-PODs.
Example:
public class JSObject
{
// has members like GetProperty/SetProperty which can act upon the
javascript object
}
public class TestClass
{
public string message = This is a C# string;
}
public class TestApp
{
public string testComplexObject(TestClass obj)
{
return obj.message;
}
public void runTest()
{
JSObject jsObj = ...;
string message = testComplexObject(jsObj);
}
}
The problem here is the testComplexObject(jsObj) call. Of course the
jsObj cannot be converted directly to a TestClass, because it's an
arbitrary javascript object.
I am wondering how IronPython solves this problem. I've read the sources a
bit and it seems it makes use of IDynamicMetaObjectProvider etc. If
JSObject provided IDynamicMetaObjectProvider, would it allow converting
the jsObj to a TestClass obj? How?
It's not easy to find information on using the DLR for things like this on
the net, so I've asked here. Apologies if I am off-topic.
-Matthias
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Re: [IronPython] Transparent import of dlls?
On Tue, Mar 29, 2011 at 4:30 AM, Markus Schaber m.scha...@3s-software.com wrote: For IronPython, there is the pyc.py compiler script. This allows a python module to be precompiled into a .NET dll. However, it seems that it is not used transparently when placed in a directory in sys.path, one has to explicitly add a Reference to the dll (via clr.AddReference or hosting API). That, currently, is the only way to do it. We’re currently using IronPytho 2.6 in a hosted .NET 2 environment. For ipy.exe, there's a special directory called 'DLLs' that it reads on startup and does the hosting equivalent of clr.AddReference for each .dll in the folder. That's about the best you can do right now. I've been thinking of adding support for .ipyd files (similar to Python .pyd files), which could handle this case, but haven't thought it through yet. - Jeff ___ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
Re: [IronPython] IronLanguages
You'll want to look at the DLR overview doc and then the Sympl sample
walkthrough doc:
http://dlr.codeplex.com/wikipage?title=Docs%20and%20specsreferringTitle=HomeProjectName=dlr
You'll want to type the parameter to testComplexObject as 'dynamic' and
implement IDMOP on JSObject, which you can see how to do from the Sympl sample.
Now, the Sympl sample is VERY light on real .NET bindin, but if it all maps to
GetProp/SetProp, then maybe this is fine. If you might flow into your code a
regular C# object (not just a JSObj), then you may want to make use of the
DefaultBinder from the DLR project, which is what the Iron languages use to get
much richer binding. You could also make use of the C# runtime binder to get
C#'s semantics for binding members of objects at runtime, but you get that for
free if you declare the parameter 'dynamic' and have your JSOjbectMetaObject
simply punt whenever the object is not a derived type of JSObject. You get
that for free because you'll call back on the binder at the obj.message call
site, and C# will have compiled that callsite to use its binder.
Bill
-Original Message-
From: users-boun...@lists.ironpython.com
[mailto:users-boun...@lists.ironpython.com] On Behalf Of Matthias
Sent: Tuesday, March 29, 2011 3:34 AM
To: users@lists.ironpython.com
Subject: [IronPython] IronLanguages
Hello,
this question is not 100% targeted at IronPython, but I didn't know a
better list to write to.
I've started writing a C# - javascript bridge. Unlike IronPython and
IronRuby I don't want to write a javascript engine in .net, but rather use
existing ones. I can already access C# classes from javascript and
instance them. The opposite way turns out to be much harder for non-PODs.
Example:
public class JSObject
{
// has members like GetProperty/SetProperty which can act upon the
javascript object
}
public class TestClass
{
public string message = This is a C# string;
}
public class TestApp
{
public string testComplexObject(TestClass obj)
{
return obj.message;
}
public void runTest()
{
JSObject jsObj = ...;
string message = testComplexObject(jsObj);
}
}
The problem here is the testComplexObject(jsObj) call. Of course the
jsObj cannot be converted directly to a TestClass, because it's an
arbitrary javascript object.
I am wondering how IronPython solves this problem. I've read the sources a
bit and it seems it makes use of IDynamicMetaObjectProvider etc. If
JSObject provided IDynamicMetaObjectProvider, would it allow converting
the jsObj to a TestClass obj? How?
It's not easy to find information on using the DLR for things like this on
the net, so I've asked here. Apologies if I am off-topic.
-Matthias
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[IronPython] IPy 2.7 successfully built for .NET 3.5, but problem w. indirect v4 dependencies
Hi, I've suceeded building 2.7 for .NET 3.5 (I'm using it in SharePoint, so there's no way to use .NET 4) and it works, using v2release configuration. I've built IronPython, IronPython.Modules, Microsoft.Dynamic, Microsoft.Scripting and Microsoft.Scripting.Core dlls. However, when I reference my class library (which is referencing my custom-built 2.7 dlls) from another solution and try to compile, I get several instances of the following warning and of course errors wherever I'm using some of my class library functions: The primary reference SPTools ... could not be resolved because it has an indirect dependency on the .NET Framework assembly mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 which has a higher version 4.0.0.0 than the version 2.0.0.0 in the current target framework. C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets I've now spent a day and half trying to get rid of this problem. I've combed through the project files - they're all switched to v2, there's nothing even vaguely v4 related, it all compiles too, the problem remains. I'd be very grateful for any ideas. Thanks Jaromír Matýšek ___ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
Re: [IronPython] IronLanguages
Just to chime in on how to do the conversion: the answer is that you probably
can't, at least not for something like TestClass. You could look at what sort
of type you're converting from in JS (number, string, function, etc...) and see
if TestClass has any implicit conversions to it from primitive .NET types
(double, string, delegate, etc...) and if so you could invoke one of those
conversions. But most likely you won't be able to convert directly to
TestClass. If TestClass was something more like IList then you could do a
conversion there as well. The only way you're likely able to convert to
TestClass is if the user got a TestClass object from .NET, brought it into JS
(where you wrapped it in some object of your own), and then you brought it back
to .NET - but then when you bring it back to .NET you should bring it back as
the real TestClass instead of your wrapped TestClass.
The only other way would be figuring out somehow to allow a JavaScript
developer to subclass a .NET TestClass type. We allow this in IronPython via
our NewTypeMaker class but we are lucky in that everything is in the .NET
world. One way you could go about this is having a function like CreateClass
which takes a subtype (TestClass) and a dictionary of string - JS functions
which you then call into for the implementation of the various subclass
methods. You would then have a .NET type which is being extended by JavaScript
- there's probably going to be some fun and tricky problems in doing this
though. Then the user can call the resulting class you give them, they'll get
an instance which is wrapped in JavaScript, and when you pass it back to .NET
you can unwrap it.
-Original Message-
From: users-boun...@lists.ironpython.com
[mailto:users-boun...@lists.ironpython.com] On Behalf Of Bill Chiles
Sent: Tuesday, March 29, 2011 9:57 AM
To: Discussion of IronPython
Subject: Re: [IronPython] IronLanguages
You'll want to look at the DLR overview doc and then the Sympl sample
walkthrough doc:
http://dlr.codeplex.com/wikipage?title=Docs%20and%20specsreferringTitle=HomeProjectName=dlr
You'll want to type the parameter to testComplexObject as 'dynamic' and
implement IDMOP on JSObject, which you can see how to do from the Sympl sample.
Now, the Sympl sample is VERY light on real .NET bindin, but if it all maps to
GetProp/SetProp, then maybe this is fine. If you might flow into your code a
regular C# object (not just a JSObj), then you may want to make use of the
DefaultBinder from the DLR project, which is what the Iron languages use to get
much richer binding. You could also make use of the C# runtime binder to get
C#'s semantics for binding members of objects at runtime, but you get that for
free if you declare the parameter 'dynamic' and have your JSOjbectMetaObject
simply punt whenever the object is not a derived type of JSObject. You get
that for free because you'll call back on the binder at the obj.message call
site, and C# will have compiled that callsite to use its binder.
Bill
-Original Message-
From: users-boun...@lists.ironpython.com
[mailto:users-boun...@lists.ironpython.com] On Behalf Of Matthias
Sent: Tuesday, March 29, 2011 3:34 AM
To: users@lists.ironpython.com
Subject: [IronPython] IronLanguages
Hello,
this question is not 100% targeted at IronPython, but I didn't know a better
list to write to.
I've started writing a C# - javascript bridge. Unlike IronPython and IronRuby
I don't want to write a javascript engine in .net, but rather use existing
ones. I can already access C# classes from javascript and instance them. The
opposite way turns out to be much harder for non-PODs.
Example:
public class JSObject
{
// has members like GetProperty/SetProperty which can act upon the
javascript object }
public class TestClass
{
public string message = This is a C# string; }
public class TestApp
{
public string testComplexObject(TestClass obj)
{
return obj.message;
}
public void runTest()
{
JSObject jsObj = ...;
string message = testComplexObject(jsObj);
}
}
The problem here is the testComplexObject(jsObj) call. Of course the jsObj
cannot be converted directly to a TestClass, because it's an arbitrary
javascript object.
I am wondering how IronPython solves this problem. I've read the sources a bit
and it seems it makes use of IDynamicMetaObjectProvider etc. If JSObject
provided IDynamicMetaObjectProvider, would it allow converting
the jsObj to a TestClass obj? How?
It's not easy to find information on using the DLR for things like this on the
net, so I've asked here. Apologies if I am off-topic.
-Matthias
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Re: [IronPython] IPy 2.7 successfully built for .NET 3.5, but problem w. indirect v4 dependencies
It sounds like you need to re-build your own DLLs (or whatever SPTools is) to run against .NET 3.5 instead of .NET 4.0. From: users-boun...@lists.ironpython.com [mailto:users-boun...@lists.ironpython.com] On Behalf Of Jaromír Matýšek Sent: Monday, March 28, 2011 8:09 AM To: iro...@googlegroups.com Subject: [IronPython] IPy 2.7 successfully built for .NET 3.5, but problem w. indirect v4 dependencies Hi, I've suceeded building 2.7 for .NET 3.5 (I'm using it in SharePoint, so there's no way to use .NET 4) and it works, using v2release configuration. I've built IronPython, IronPython.Modules, Microsoft.Dynamic, Microsoft.Scripting and Microsoft.Scripting.Core dlls. However, when I reference my class library (which is referencing my custom-built 2.7 dlls) from another solution and try to compile, I get several instances of the following warning and of course errors wherever I'm using some of my class library functions: The primary reference SPTools ... could not be resolved because it has an indirect dependency on the .NET Framework assembly mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 which has a higher version 4.0.0.0 than the version 2.0.0.0 in the current target framework. C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets I've now spent a day and half trying to get rid of this problem. I've combed through the project files - they're all switched to v2, there's nothing even vaguely v4 related, it all compiles too, the problem remains. I'd be very grateful for any ideas. Thanks Jaromír Matýšek ___ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
Re: [IronPython] IronLanguages
Am 29.03.2011, 18:57 Uhr, schrieb Bill Chiles bill...@microsoft.com: You'll want to look at the DLR overview doc and then the Sympl sample walkthrough doc: http://dlr.codeplex.com/wikipage?title=Docs%20and%20specsreferringTitle=HomeProjectName=dlr Thanks for the link, it will keep me busy for a while :) You'll want to type the parameter to testComplexObject as 'dynamic' and I was assuming testComplexObject came out of some third party c# library which I cannot change. So making it dynamic is not possible. implement IDMOP on JSObject, which you can see how to do from the Sympl sample. Now, the Sympl sample is VERY light on real .NET bindin, but if it all maps to GetProp/SetProp, then maybe this is fine. If you might flow into your code a regular C# object (not just a JSObj), then you may want to make use of the DefaultBinder from the DLR project, which is what the Iron languages use to get much richer binding. You could also make use of the C# runtime binder to get C#'s semantics for binding members of objects at runtime, but you get that for free if you declare the parameter 'dynamic' and have your JSOjbectMetaObject simply punt whenever the object is not a derived type of JSObject. You get that for free because you'll call back on the binder at the obj.message call site, and C# will have compiled that callsite to use its binder. Ok, I need to read more of the document and apply what I learned to what you just said :) Thanks for your help! -Matthias ___ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
Re: [IronPython] IronLanguages
Am 29.03.2011, 19:27 Uhr, schrieb Dino Viehland di...@microsoft.com: Just to chime in on how to do the conversion: the answer is that you probably can't, at least not for something like TestClass. You could look at what sort of type you're converting from in JS (number, string, function, etc...) and see if TestClass has any implicit conversions to it from primitive .NET types (double, string, delegate, etc...) and if so you could invoke one of those conversions. But most likely you won't This is what I am doing now already and it works quite nicely for simple types. be able to convert directly to TestClass. If TestClass was something more like IList then you could do a conversion there as well. The only way you're likely able to convert to TestClass is if the user got a TestClass object from .NET, brought it into JS (where you wrapped it in some object of your own), and then you brought it back to .NET - but then when you bring it back to .NET you should bring it back as the real TestClass instead of your wrapped TestClass. Yes, I have thought to force users to inherit from (use a prototype object) which comes from .net. The only other way would be figuring out somehow to allow a JavaScript developer to subclass a .NET TestClass type. We allow this in IronPython via our NewTypeMaker class but we are lucky in that everything is in the .NET world. One way you could go about this is having a function like CreateClass which takes a subtype (TestClass) and a dictionary of string - JS functions which you then call into for the implementation of the various subclass methods. You would then have a .NET type which is being extended by JavaScript - there's probably going to be some fun and tricky problems in doing this though. Then the user can call the resulting class you give them, they'll get an instance which is wrapped in JavaScript, and when you pass it back to .NET you can unwrap it. Yes, this was my main idea. It's very similar how SWIG directors handle cross-language polymorphism. At runtime I'd create a class which derives from TestClass and which overrides all virtual methods and properties. The C# overrides would call the JSObject to see if there's a javascript implementation for them. If there is, it will call the javascript implementation, otherwise it will call the base class's (TestClass in the example) implementation. -Matthias ___ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
Re: [IronPython] IronLanguages
Matthias wrote: Yes, this was my main idea. It's very similar how SWIG directors handle cross-language polymorphism. At runtime I'd create a class which derives from TestClass and which overrides all virtual methods and properties. The C# overrides would call the JSObject to see if there's a javascript implementation for them. If there is, it will call the javascript implementation, otherwise it will call the base class's (TestClass in the example) implementation. Ok, then you totally want to look at NewTypeMaker in either IronRuby or IronPython - they're slightly different but they both do the same thing and already handle all sorts of corner cases w/ .NET types so it should be a good starting point. ___ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
[IronPython] Newbie InterOp-related question
Hi, I've just started using IronPython but have hit a bit of a roadblock. This may also be caused by inadequate .Net knowledge. In C# I can call a COM object (where the COM method is going to fill in the parameter) like so: object blah; myComObj.Foo(out blah); If for example the COM method returns an array of strings ( with the parameter VARIANT* in COM method signature) then in C# I get an object[] back which with appropriate massaging I can process. How would I declare the variable in Python if I want access the returned contents correctly? Knowing I was to get an array back I naively tried: blah = [] myComObj.Foo(blah) The call is made correctly - I can see the COM object is filling out the return parameter OK but blah remains an empty list. Any insights on what I should be doing more than welcome, Thanks, Paul ___ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
