Mailman 3 - Python.NET

Re: DLL Processor compatibility
by Victor “LOST” Milovanov 05 Mar '20

05 Mar '20

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Re: DLL Processor compatibility
by Victor “LOST” Milovanov 05 Mar '20

05 Mar '20

3 2

Re: DLL Processor compatibility
by Victor “LOST” Milovanov 04 Mar '20

04 Mar '20

2 2

[NuGet Gallery] Recent changes to your organization's email
by NuGet Gallery 04 Mar '20

04 Mar '20

The email address associated with your NuGet Gallery organization was recently changed from pythondotnet(a)python.org to pythonnet-dev(a)python.org. Thanks, The NuGet Gallery Team Privacy Statement (https://go.microsoft.com/fwlink/?LinkId=521839) Microsoft Corporation One Microsoft Way Redmond, WA 98052 USA

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Re: Accessing a list that is a read-only property?
by Victor “LOST” Milovanov 04 Mar '20

04 Mar '20

2 1

DLL Processor compatibility
by Govil Nag 04 Mar '20

04 Mar '20

hallo, pythonnet dll work either x64 bit processor or x86 processor ..is it possible to run it in visual Studio with "Any CPU"

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Accessing a list that is a read-only property?
by Mark Brighton 03 Mar '20

03 Mar '20

Hello, I think this is a really basic question, but despite searching I haven't found a solution. I've been asked to use a .NET assembly from python. I have programed in other languages, but not C#. In the brief time I've used it, PythonNet has been fantastic... with one little wrinkle. Here's a pared down version of the C# that I’m trying to access from Python: namespace Service.API { public class ServiceAPI { private static ServiceAPI m_Instance = new ServiceAPI(); public static ServiceAPI Instance { get { return m_Instance; } } public ServiceAPI() { } ~ServiceAPI() {} ServiceInformation m_ServiceInformation = new ServiceInformation(); public List<string> ServiceHosts { get { return m_ServiceInformation.ServiceHosts; } } } public class ServiceInformation { public List<string> ServiceHosts { get; set; } public ServiceInformation() { ServiceHosts = new List<string>(); } } } I need to add strings to the List “ServiceHosts”, accessing it via a ServiceAPI object. The author placed the List inside another class, "ServiceInformation" and did not provide a set accessor, so that the ServiceHosts could not be altered to another object, while allowing strings to be added and removed from it. I think adding a string to that list is trivial in C#: ServiceAPI.Instance.ServiceHosts.Add('1.1.1.1'); So I try it in Python: >>> import clr # Pyton.NET package >>> clr.AddReference("Service.API") >>> import Service.API >>> import System >>> Service.API.ServiceAPI.Instance.ServiceHosts.Add('1.1.1.1') Traceback (most recent call last): File "<interactive input>", line 1, in <module> AttributeError: 'ServiceAPI' object has no attribute 'Add' This is a List that PythonNet is mapping onto a python list: >>> Service.API.ServiceAPI.Instance.ServiceHosts [] So try using a python method: >>> Service.API.ServiceAPI.Instance.ServiceHosts.append('1.1.1.1') >>> Service.API.ServiceAPI.Instance.ServiceHosts [] Nope. And I start suspecting that I've added that string to a boxed version of the list. But because there's no set accessor, I can't do this: >>> hosts = Service.API.ServiceAPI.Instance.ServiceHosts >>> hosts.append('1.1.1.1') >>> Service.API.ServiceAPI.Instance.ServiceHosts = hosts Traceback (most recent call last): File "<interactive input>", line 1, in <module> TypeError: property is read-only So what about calling the unbound list method, passing in the list? >>> System.Collections.Generic.List[String].Add( Service.API.ServiceAPI.Instance.ServiceHosts, '1.1.1.1') Traceback (most recent call last): File "<interactive input>", line 1, in <module> AttributeError: 'ServiceAPI' object has no attribute 'Add' The author of this assembly has offered to create a specific method so that I can access the list, but he assures me that this is a common C# pattern that I will encounter frequently. I can't just create an instance of ServiceInformation and add the hosts to that, ServiceAPI has no method for getting or setting m_ServiceInformation. Any help in setting me in the right direction would be appreciated. Thanks, Mark Brighton

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How do you add an element to a List in a read-only property?
by mark＠brightsoftwaredesign.com 02 Mar '20

02 Mar '20

Hello, I think this is a really basic question, but I haven't found a solution. I've been asked to use a .NET assembly from python. I have programed in other languages, but not C#. In the brief time I've used it, PythonNet has been fantastic... with one little wrinkle. Here's a pared down version of the C#: namespace Service.API { public class ServiceAPI { private static ServiceAPI m_Instance = new ServiceAPI(); public static ServiceAPI Instance { get { return m_Instance; } } public ServiceAPI() { } ~ServiceAPI() {} ServiceInformation m_ServiceInformation = new ServiceInformation(); public List<string> ServiceHosts { get { return m_ServiceInformation.ServiceHosts; } } } public class ServiceInformation { public List<string> ServiceHosts { get; set; } public ServiceInformation() { ServiceHosts = new List<string>(); } } } I need to add strings to the List "ServiceHosts" in ServiceAPI. The author placed the List inside another class, "ServiceInformation" and did not provide a set method, so that the ServiceHosts could not be altered to another object, while allowing strings to be added and removed from it. I think adding a string to that list is trivial in C#: (I've been assured by the assembly author that this works) ServiceAPI.Instance.ServiceHosts.Add('1.1.1.1'); So I try it in Python: >>> import clr # Pyton.NET package >>> clr.AddReference("Service.API") >>> import Service.API >>> import System # This is a .NET package. >>> Service.API.ServiceAPI.Instance.ServiceHosts.Add('1.1.1.1') Traceback (most recent call last): File "<interactive input>", line 1, in <module> AttributeError: 'ServiceAPI' object has no attribute 'Add' This is a List that PythonNet is mapping onto a python list: >>> Service.API.ServiceAPI.Instance.ServiceHosts [] So try using a python method: >>> Service.API.ServiceAPI.Instance.ServiceHosts.append('1.1.1.1') >>> Service.API.ServiceAPI.Instance.ServiceHosts [] Nope. And I start suspecting that I've added that string to a boxed version of the list. But because there's no set accessor, I can't do this: >>> hosts = Service.API.ServiceAPI.Instance.ServiceHosts >>> hosts.append('1.1.1.1') >>> Service.API.ServiceAPI.Instance.ServiceHosts = hosts Traceback (most recent call last): File "<interactive input>", line 1, in <module> TypeError: property is read-only So what about calling the unbound list method, passing in the list? >>> System.Collections.Generic.List[String].Add( Service.API.ServiceAPI.Instance.ServiceHosts, '1.1.1.1') Traceback (most recent call last): File "<interactive input>", line 1, in <module> AttributeError: 'ServiceAPI' object has no attribute 'Add' The author of this assembly has offered to create a specific method so that I can access the list, but he assures me that this is a common C# pattern that I will encounter frequently. I can't just create an instance of ServiceInformation and add the hosts to that, ServiceAPI has no method for getting or setting m_ServiceInformation. Any help in setting me in the right direction would be appreciated. Thanks, Mark Brighton

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[NuGet Gallery] Membership update for organization 'pythonnet'
by NuGet Gallery 20 Feb '20

20 Feb '20

The user 'lost' is now an administrator of organization 'pythonnet'. Thanks, The NuGet Gallery Team Privacy Statement (https://go.microsoft.com/fwlink/?LinkId=521839) Microsoft Corporation One Microsoft Way Redmond, WA 98052 USA

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Working group notes for Feb 13, 2020
by Mark Visser 20 Feb '20

20 Feb '20

Attendees: Victor, Benoit, Amos, Mohammed Agenda Review action items from last meeting: Benoit will write github issue documenting GIL best practices when running multithreaded code and possible solutions [in progress, wiki page + tests] Benedikt will look into splitting up CLR loader into multiple work items to speed up .NET Core support Victor will address comments on codec PR - ready to check in Victor - will work on breaking up Quantconnect PR Mohamed will rebase #974 on top of Victor's codec PR ? - github actions Victor will send Benoit & Felix build that failed on Linux 3.7 Benoit will continue working on PR #1016 Amos is having connection issues and will send an update email to the mailing list Create NuGet organization and transfer package ownership for NuGet package <https://www.nuget.org/packages/pythonnet/> Notes Benoit will work on wiki page + tests for GIL Quantconnect PR Converter-related stuff depends on codecs repository Performance in separate PR Mohamed will rebase #974 - handle generic parameters on action type, needs repo for codecs Victor made repo <https://github.com/losttech/PackagedTensorFlow> + NuGet <https://www.nuget.org/packages/LostTech.TensorFlow.Python> with packaged Python Action Items Benoit to finish wiki page for threading Victor will talk to Benedikt regarding creating a lib/separate repo for codecs Quantconnect PR - Victor to ensure Amos commits are mirrored in master Amos should take over PR #1016 Victor will try to review #958 instead See if Benedikt needs better time or we can make decisions while he’s off Unity is settled on 2.4.0, and might reduce presence The meeting notes google doc is here <https://docs.google.com/document/d/1rJVU84B_dgx58-_EopjRtOJVFAI2WfHJYV0n7uE…>. Feel free to correct or add additional information. The next meeting will be held on Thursday, February 27th at 12pm EST, 9am PST, 6pm CET, 1am China. Mark Visser Tooling Dev Manager Unity Technologies - www.unity3d.com <http://www.unity3d.com/>

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