Mailman 3 July 2017 - Python.NET

.NET Core support
by Mark Traudt Sept. 14, 2017

Sept. 14, 2017

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 Aug. 18, 2017

Aug. 18, 2017

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 talk at PyData Seattle 2017 hosted by Microsoft
by Denis Akhiyarov July 27, 2017

July 27, 2017

Video and presentation for pythonnet talk at PyData Seattle 2017 hosted by Microsoft: https://www.youtube.com/watch?v=P7Or7XzeIno http://nbviewer.jupyter.org/gist/denfromufa/1fdb51fc58663c2fb058f0860cb03768 If you would like to get my talk accepted to PyGotham 2017 in NYC, please vote here: https://www.papercall.io/pygotham-2017 I collected about 10-20 responses about pythonnet use cases! Please email me or call me (+19182003994), if you have anything to share on public or confidential terms. This is NOT a request for sponsorship. https://mail.python.org/pipermail/pythondotnet/2017-July/001906.html

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Re: [Python.NET] PythonDotNet Digest, Vol 156, Issue 4
by pythondotnet July 21, 2017

July 21, 2017

Thanks Denis. How do the versions on github map to the versions on the old site? I need to avoid this defect: https://github.com/pythonnet/pythonnet/issues/276 On the old site, I could see which version was the CLR2, defect-free one (pythonnet-2.0-alpha2-clr2.0_py27/), but it is only 32-bt. I think the corresponding version on github is 2.0.0, but I can't figure out how to just download the 64-bit version of 2.0.0. --------- Original Message --------- Subject: PythonDotNet Digest, Vol 156, Issue 4 From: pythondotnet-request(a)python.org Date: 7/20/17 10:00 am To: pythondotnet(a)python.org Send PythonDotNet mailing list submissions to pythondotnet(a)python.org To subscribe or unsubscribe via the World Wide Web, visit https://mail.python.org/mailman/listinfo/pythondotnet or, via email, send a message with subject or body 'help' to pythondotnet-request(a)python.org You can reach the person managing the list at pythondotnet-owner(a)python.org When replying, please edit your Subject line so it is more specific than "Re: Contents of PythonDotNet digest..." Today's Topics: 1. Support for WinPython 2.7 x64 (pythondotnet) 2. Re: Support for WinPython 2.7 x64 (Denis Akhiyarov) ---------------------------------------------------------------------- Message: 1 Date: Wed, 19 Jul 2017 09:00:12 -0700 From: "pythondotnet" <PythonDotNet(a)jnpcarole.com> To: pythondotnet(a)python.org Subject: [Python.NET] Support for WinPython 2.7 x64 Message-ID: <20170719090012.3e63f68611bc0deecd5a6dd5fef89a2f.3933b3b147.mailapi(a)email09.godaddy.com> Content-Type: text/plain; charset="utf-8" I have a user that needs Python for .NET to work with https://sourceforge.net/projects/winpython/files/WinPython_2.7/2.7.9.1/ I'm guessing it isn't a problem that he has WinPython as opposed to regular CPython, but I don't see support for 64-bit on https://sourceforge.net/projects/pythonnet/ Is what he needs possible?

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Support for WinPython 2.7 x64
by pythondotnet July 19, 2017

July 19, 2017

I have a user that needs Python for .NET to work with https://sourceforge.net/projects/winpython/files/WinPython_2.7/2.7.9.1/ I'm guessing it isn't a problem that he has WinPython as opposed to regular CPython, but I don't see support for 64-bit on https://sourceforge.net/projects/pythonnet/ Is what he needs possible?

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Python.NET user feedback
by Denis Akhiyarov July 10, 2017

July 10, 2017

Hello Python.NET users, After PyData talk, I was approached by a potential supporter of Python.NET project from one of major corporations. But they need your feedback and estimate of current users of pythonnet library for this support to be approved. Please respond to me privately or publicly about your specific use case or project, any outstanding issues or success stories. Please mark if this feedback should be kept confidential. Here is an updated and collected public list of open-source and commercial projects using pythonnet: https://github.com/pythonnet/pythonnet/wiki/Projects-using-pythonnet Thanks, Denis

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Syntax for PyDict from C#
by Denis Akhiyarov July 6, 2017

July 6, 2017

Anyone has a good example how to construct Python dictionary from C#? Adding elements one by one in a loop is not an option.

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