Mailman 3 January 2017 - Python.NET

.NET Core support
by Mark Traudt 14 Sep '17

14 Sep '17

I see there is a project for .NET Core at https://github.com/pythonnet/pythonnet/projects/2 but it is empty. Is there any work being done on this? If not, would you accept a pull request if somebody wanted to help? Mark Traudt | Chief Technology Officer Quantifi Inc. 17 Union Pl | Floor 2 | Summit | New Jersey | 07901 Tel: +1 (908) 273-9455 [https://www.quantifisolutions.com/Data/Sites/1/media/emailsignature/horizon…]<https://www.quantifisolutions.com> [https://www.quantifisolutions.com/Data/Sites/1/media/emailsignature/web_ema…]<https://www.quantifisolutions.com> [https://www.quantifisolutions.com/Data/Sites/1/media/emailsignature/twitter…] <https://twitter.com/quantifi> [https://www.quantifisolutions.com/Data/Sites/1/media/emailsignature/linkedi…] <https://www.linkedin.com/company/quantifi-inc-> [https://www.quantifisolutions.com/Data/Sites/1/media/emailsignature/google_…] <https://plus.google.com/+Quantifisolutions-software> Notice: This email message, together with any attachments, contains information of Quantifi, Inc. (Summit, NJ, USA) that may be confidential, proprietary, copyrighted, and/or legally privileged, and is intended solely for the use of the individual or entity named in this message. If you are not the intended recipient, and have received this message in error, please immediately return this by email and then delete it.

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Inheriting from abstract .NET class
by Henning Moeller 18 Aug '17

18 Aug '17

Hello out there, I'm trying to inherit from an abstract .NET base class in Python (2.7). I'm a Python n00b but from what I understood... Here's what I managed to do in Python only and which works fine: [File: room.py] ------- import abc class Room(object): def __init__(self, door): self.door = door def open(self): self.door.open() def close(self): self.door.close() def is_open(self): return self.door.is_open() class Door(object): __metaclass__ = abc.ABCMeta def open(self): if not self.is_open(): self.toggle() def close(self): if self.is_open(): self.toggle() @abc.abstractmethod def is_open(self): pass @abc.abstractmethod def toggle(self): pass class StringDoor(Door): def __init__(self): self.status = "closed" def is_open(self): return self.status == "open" def toggle(self): if self.status == "open": self.status = "closed" else: self.status = "open" class BooleanDoor(Door): def __init__(self): self.status = True def is_open(self): return self.status def toggle(self): self.status = not (self.status) Door.register(StringDoor) Door.register(BooleanDoor) ------- Now, all I did was to replace the abstract base class Door by a C# representation: [File: PythonAbstractBaseClass.dll] ------- namespace PythonAbstractBaseClass { public abstract class Door { public virtual void Open() { if (!IsOpen()) Toggle(); } public virtual void Close() { if (IsOpen()) Toggle(); } public abstract bool IsOpen(); public abstract void Toggle(); } } ------- Removing Door from the Python part and importing it from the .NET assembly instead, I end up with this: [File: room2.py] ------- import clr import abc from PythonAbstractBaseClass import Door class Room(object): def __init__(self, door): self.door = door def open(self): self.door.open() def close(self): self.door.close() def is_open(self): return self.door.is_open() class StringDoor(Door): def __init__(self): self.status = "closed" def is_open(self): return self.status == "open" def toggle(self): if self.status == "open": self.status = "closed" else: self.status = "open" class BooleanDoor(Door): def __init__(self): self.status = True def is_open(self): return self.status def toggle(self): self.status = not (self.status) Door.register(StringDoor) Door.register(BooleanDoor) ------- But this fails with the following error message: Door.register(StringDoor) AttributeError: type object 'Door' has no attribute 'register' >From what I understood about abc.ABCMeta, this metaclass contributes the 'register' method. It seems that abstract C# classes do not come with the same metaclass. They instead come with metaclass "CLR Metatype" which obviously does not provide 'register'. But if I drop the call to 'register', on instantiating one of the derived classes, I receive the error message sdoor = StringDoor() TypeError: cannot instantiate abstract class Is there a way to inherit from an abstract .NET class or is this is missing feature? Thanks in advance, Henning

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PythonNet on Cygwin
by Nikhil Garg 21 Jun '17

21 Jun '17

Hi Guys, I was wondering if anyone knows how to make Python for .Net work on cygwin installation of python. I have been looking around and find a mixed bag of information. If anyone knows of the working version of Python for .Net and its dependency, I would appreciate if you could share it with me. Currently, I am using a generic windows version and it works just fine, but I need it to work on Cygwin version of python. I appreciate any helpful replies. Thanks, Nikhil

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cx_freeze and python.net
by Boris Burdin 22 May '17

22 May '17

Hello everybody, I'm trying to build a python.net application using cx-freeze . Once the application is built, I put in my final folder the Python.Runtime.dll. but it stil doesn't seem to work . Actually, when I run the .exe file, nothing is happening. So, I wonder if there were something else to do, another dll to put in the folder, or any option to use with cx_freeze when building the application ? i would be very grateful if you could help me on this matter .. Thanks in advance, Boris

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Python for .NET (pythonnet) v2.2.2 with Python 3.6 support and MIT license
by Denis Akhiyarov 30 Jan '17

30 Jan '17

Download from PYPI using pip or from Anaconda using conda: https://pypi.python.org/pypi/pythonnet/2.2.2 https://anaconda.org/pythonnet/pythonnet [image: Inline image 1] Latest release v2.2.2 Fixed Missing files from packaging (#336) v2.2.1 News transition from Zope to MIT license is completed! 3 new pythonnet core developers @denfromufa @filmor @vmuriart 32+1 contributors clrmagic for IPython kernel presentation on PyOhio 2016 Changelog since v2.2.0-dev1 v2.2.0 had a release issue on pypi. Bumped to v2.2.1 Added Python 3.6 support (#310) Added __version__ to module (#312) Added conda recipe (#281) Nuget update on build (#268) Added __cause__ attribute on exception (#287) Changed License to MIT (#314) Project clean-up (#320) Refactor #if directives Rename Decref/Incref to XDecref/XIncre (#275) Remove printing if Decref is called with NULL (#275) Removed Python 2.6 support (#270) Python 3.2 support (#270) Fixed Fixed isinstance refcount_leak (#273) Comparison Operators (#294) Improved Linux support (#300) Exception pickling (#286) Known Issues Subclassing .NET classes (#264) Mixing python and .NET constructors (#252) Overloading on constructors, ref/out and subtypes (#265) pythonhome and pythonpath (#186) Regression bug on numpy arrays (#249) Upcoming Changes Partial .NET Core support Mac OSX testing and builds

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(no subject)
by durandmchelle 28 Jan '17

28 Jan '17

HI Dear,

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