From alberto at metapensiero.it  Wed Aug  1 03:22:46 2007
From: alberto at metapensiero.it (Alberto Berti)
Date: Wed, 01 Aug 2007 03:22:46 +0200
Subject: [Python.NET] Packages are wrongly initialized?
Message-ID: <87y7gwjbfd.fsf@lizard.lizardnet>

Hi all,

i'm in the process of embedding python in a C# application. After
initializing the engine, my application imports via (ImportModule) a
custom package which contains  the python side of my code. 

doing the following code raises an AttributeError Exception:

PyObject pypackage = PythonEngine.ImportModule('pypackage');
PyObject sub_module = pypackage.GetAttr('sub_module'); <-- raises the exception here

One other thing that isn't working is a non empty __init__.py inside
the package; trying to import any symbol defined in the __init__.py
also raises an AttributeError.

instead, this line works as expected:

PyObject pypackage = PythonEngine.ImportModule('pypackage.submodule');

I've tried the code with the old trunk and with the newer Christian's
one.

am I doing something wrong?
Anyone as any clue?

thanks in advance

Alberto


From alberto at metapensiero.it  Wed Aug  1 05:46:34 2007
From: alberto at metapensiero.it (Alberto Berti)
Date: Wed, 01 Aug 2007 05:46:34 +0200
Subject: [Python.NET] Packages are wrongly initialized?
In-Reply-To: <C2D5604B.CFF1%brian.lloyd@revolutionhealth.com> (Brian Lloyd's
	message of "Tue\, 31 Jul 2007 21\:55\:23 -0400")
References: <C2D5604B.CFF1%brian.lloyd@revolutionhealth.com>
Message-ID: <87tzrjkjc5.fsf@lizard.lizardnet>

>>>>> "Brian" == Brian Lloyd <brian.lloyd at revolutionhealth.com> writes:

    Brian> Note that imports are subtley different than getattr
    Brian> behavior...  does your main main 'pypackage' package
    Brian> contain something like the following in its __init__?

    Brian> from subpackage import *

It's really late here, but if i correctly remember i've tried  a star
import, a named import and an empty __init__.py, all with the same
effect,  but i will retry asap, thanks.

Alberto

From lists at cheimes.de  Wed Aug  1 08:06:12 2007
From: lists at cheimes.de (Christian Heimes)
Date: Wed, 01 Aug 2007 08:06:12 +0200
Subject: [Python.NET] Packages are wrongly initialized?
In-Reply-To: <87y7gwjbfd.fsf@lizard.lizardnet>
References: <87y7gwjbfd.fsf@lizard.lizardnet>
Message-ID: <f8p7t3$o8m$1@sea.gmane.org>

Alberto Berti wrote:
> doing the following code raises an AttributeError Exception:
> 
> PyObject pypackage = PythonEngine.ImportModule('pypackage');
> PyObject sub_module = pypackage.GetAttr('sub_module'); <-- raises the exception here

That doesn't work under Python unless pypackage import submodule  in its
__init__.py:

$ python
Python 2.5.1 (r251:54863, May  2 2007, 16:56:35)
[GCC 4.1.2 (Ubuntu 4.1.2-0ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import email
>>> getattr(email, 'charset')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'charset'
>>> import email.charset
>>> getattr(email, 'charset')
<module 'email.charset' from 'email/charset.pyc'>

Christian


From brian.lloyd at revolutionhealth.com  Wed Aug  1 03:55:23 2007
From: brian.lloyd at revolutionhealth.com (Brian Lloyd)
Date: Tue, 31 Jul 2007 21:55:23 -0400
Subject: [Python.NET] Packages are wrongly initialized?
In-Reply-To: <87y7gwjbfd.fsf@lizard.lizardnet>
Message-ID: <C2D5604B.CFF1%brian.lloyd@revolutionhealth.com>

Note that imports are subtley different than getattr behavior...

does your main main 'pypackage' package contain something like
the following in its __init__?

from subpackage import *

-Brian


On 7/31/07 9:22 PM, "Alberto Berti" <alberto at metapensiero.it> wrote:

> Hi all,
> 
> i'm in the process of embedding python in a C# application. After
> initializing the engine, my application imports via (ImportModule) a
> custom package which contains  the python side of my code.
> 
> doing the following code raises an AttributeError Exception:
> 
> PyObject pypackage = PythonEngine.ImportModule('pypackage');
> PyObject sub_module = pypackage.GetAttr('sub_module'); <-- raises the
> exception here
> 
> One other thing that isn't working is a non empty __init__.py inside
> the package; trying to import any symbol defined in the __init__.py
> also raises an AttributeError.
> 
> instead, this line works as expected:
> 
> PyObject pypackage = PythonEngine.ImportModule('pypackage.submodule');
> 
> I've tried the code with the old trunk and with the newer Christian's
> one.
> 
> am I doing something wrong?
> Anyone as any clue?
> 
> thanks in advance
> 
> Alberto
> 
> _________________________________________________
> Python.NET mailing list - PythonDotNet at python.org
> http://mail.python.org/mailman/listinfo/pythondotnet

--------------------------
Brian Lloyd

brian.lloyd at revolutionhealth.com



From lists at cheimes.de  Fri Aug  3 14:21:06 2007
From: lists at cheimes.de (Christian Heimes)
Date: Fri, 03 Aug 2007 14:21:06 +0200
Subject: [Python.NET] PythonNet news
In-Reply-To: <8674D71026D5C848831DB7CA34B1C75862FD20@fds1wmail01.funddevelopmentservices.com>
References: <f8gp0u$fee$1@sea.gmane.org>
	<8674D71026D5C848831DB7CA34B1C75862FD20@fds1wmail01.funddevelopmentservices.com>
Message-ID: <f8v6j2$s4l$1@sea.gmane.org>

Maksim Kozyarchuk wrote:
> Do you have a sense of what it would take to make current trunk
> of PythonNet compatible with Python 2.3?

I added some code for Python 2.3. Please consider it mostly working but
not officially supported by me. The clr.so and the examples in
src/monoclr/ don't build due missing set and subprocess modules and I
run into some strange problems with large doubles.

Christian




From par at sundback.com  Sat Aug 25 20:35:38 2007
From: par at sundback.com (=?iso-8859-1?Q?P=E4r_Sundb=E4ck?=)
Date: Sat, 25 Aug 2007 20:35:38 +0200
Subject: [Python.NET] How to use Dll-methods with [out]-arguments and no
	constructor for the argument-class
Message-ID: <000d01c7e746$bc56a370$0201a8c0@PskAmilo>

Hi

I am using Python .Net together with PythonWin 2.5.
My task is to use a .Net assembly dll from a python testscript.

The dll is written i C# to create interfaces by refering them as [out]arguments. I am supposed to be sending a reference to a datatype/interface and then get a handle to that created interface for further processing.

The original C# method in the dll looks something like:

HResult=CreateInstance([out] ICHardware hw)

In python I receive this (ofcourse) when using the class (not instance) of the datatype as argument:

>>> hw=ICHardware
>>> ICProductFactory.CreateInstance(hw)
Traceback (most recent call last):
File "<interactive input>", line 1, in <module>
TypeError: No method matches given arguments

My problem is that I can not create an instance of ICHardware from Python since the constructor is hidden in the dll (or not in there at all).

In C# I would do like this when using the dll:

ICHardware hw;
ICProductFactory.CreateInstance(hw);
hw.Method....

In Python this is not possible since I can not declare a variable without assign a value or running the constructor, or? Maybe someone knows a work-around for this. I'll be happy for all feedback.

Regards /P?r


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