[Python.NET] Fwd: PythonNET 2.0 Alpha2 and .NET 4.0

Oleksii Bidiuk oleksii.bidiuk at gmail.com
Tue Jan 11 15:17:24 CET 2011


Hi Barton,

do you still have any plans to work on the merge? I am curious what the
changes are (how much, what impact do they have) and whether there something
can be done to help you with this.

Thanks in advance!

2011/1/7 Barton <barton at bcdesignswell.com>

>  I've got this working on my private (for the moment) branch.  I could do
> this merge by this weekend if folks will find it useful.
> -Barton
>
>
> On 1/6/2011 6:59 AM, Oleksii Bidiuk wrote:
>
> Hi Alla,
>
>  thanks for your prompt repsonse. In Python terms String('A') means
> constructor with a string parameter AFAIK. When I use the python.exe build
> against CLR 2.0 (from pythonnet-2.0-alpha2-clr2.0_115_py26.zip) it works,
> but then it talks against .NET 2.0 while I want to talk to the same 4.0
> version as my .NET application.
>
>  With the example below using the .NET 2.0 version I get
>
>   >>> s = String.__overloads__[Char, Int32]('A', 10)
>  Traceback (most recent call last):
>    File "<stdin>", line 1, in <module>
> AttributeError: type object 'String' has no attribute '__overloads__'
>
>  Basically it seems that the version of python for .net compiled against
> .NET 4.0 runtime does not work out of box for me. I wonder if somebody had
> more luck with this.
>
> 2011/1/6 Alla Gofman <Alla.Gofman at sandisk.com>
>
>   Hi Oleksii,
>>
>>
>>
>> I have no experience with importing .net modules into Python.
>>
>> I work on embedding Python into C#.
>>
>> There is no such constructor String('A') for String class as you use,
>> which gets char.
>>
>> You can see which constructors exists in:
>> http://msdn.microsoft.com/en-us/library/system.string.string.aspx
>>
>>
>>
>> Example:
>>
>> I read in http://pythonnet.sourceforge.net/readme.html
>>
>> In most cases, Python for .NET can determine the correct constructor to
>> call automatically based on the arguments. In some cases, it may be
>> necessary to call a particular overloaded constructor, which is supported by
>> a special "__overloads__" attribute on a class:
>>
>>     from System import String, Char, Int32
>>
>>
>>
>>     s = String.__overloads__[Char, Int32]('A', 10)
>>
>>
>>
>> I hope you succeed,
>>
>>
>>  Alla
>>
>>
>>
>> *From:* pythondotnet-bounces+alla.gofman=sandisk.com at python.org [mailto:
>> pythondotnet-bounces+alla.gofman <pythondotnet-bounces%2Balla.gofman>=
>> sandisk.com at python.org] *On Behalf Of *Oleksii Bidiuk
>> *Sent:* Thursday, January 06, 2011 4:27 PM
>> *To:* pythondotnet at python.org
>> *Subject:* [Python.NET] PythonNET 2.0 Alpha2 and .NET 4.0
>>
>>
>>
>> Hi,
>>
>>
>>
>> I am trying to use Python for .NET under VS2010 and .NET 4.0. I've
>> downloaded the pythonnet-2.0-alpha2.zip and changed the project settings to
>> use .NET 4.0 under VS2010 and recompiled everything. The resulting
>> python.exe can be run, and statements like "import clr" and "from System
>> import String" work (as the Python standard library calls as well) until I
>> try to instantiate a class as e.g.
>>
>>
>>
>> s = String('A')
>>
>> At this moment the Python for .NET seem to crash in nativecall.cs at
>> NativeCall.Call_3() at (the only) line
>>
>>
>>
>> return Impl.Call_3(fp, a1, a2, a3);
>>
>>
>>
>> with dreaded "Exception of type 'System.ExecutionEngineException' was
>> thrown.". Trying to instantiate Int32() object results in "Attempted to read
>> or write protected memory. This is often an indication that other memory is
>> corrupt."
>>
>>
>>
>> Suggestions are more than welcome! Thanks in advance!
>> --
>> oleksii
>>
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>
>
> --
> oleksii
>
>
>
> --
> oleksii
>
>
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-- 
oleksii
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