From tunger at mitem.com  Fri Jun  1 13:55:54 2018
From: tunger at mitem.com (Tom Unger)
Date: Fri, 1 Jun 2018 17:55:54 +0000
Subject: [Python.NET] Finalizers and proper dereference of CPython objects
Message-ID: <MW2PR1901MB21555B030B958787469B3E80D2620@MW2PR1901MB2155.namprd19.prod.outlook.com>


PythonException, PyObjecdt, PyScope have finallizers defined as:

        ~PyObject()
        {
            // We needs to disable Finalizers until it's valid implementation.
            // Current implementation can produce low probability floating bugs.
            return;

            Dispose();
        }

So the finalizer does not call dispose.  Does this mean that I must explicitly Dispose all such objects to ensure no memory leaks?

Thanks,

Tom


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/pythondotnet/attachments/20180601/f83f1ef5/attachment.html>

From denis.akhiyarov at gmail.com  Thu Jun  7 23:18:28 2018
From: denis.akhiyarov at gmail.com (Denis Akhiyarov)
Date: Thu, 7 Jun 2018 22:18:28 -0500
Subject: [Python.NET] Finalizers and proper dereference of CPython
 objects
In-Reply-To: <MW2PR1901MB21555B030B958787469B3E80D2620@MW2PR1901MB2155.namprd19.prod.outlook.com>
References: <MW2PR1901MB21555B030B958787469B3E80D2620@MW2PR1901MB2155.namprd19.prod.outlook.com>
Message-ID: <CALxxJLQd5k0hikWBQqHyZfqztf6awt3BoK_B2=2b6YoMEdmYxQ@mail.gmail.com>

There is a fix for this but the code review and merging of related PR is
not complete yet:

https://github.com/pythonnet/pythonnet/issues/541


On Fri, Jun 1, 2018, 12:56 PM Tom Unger <tunger at mitem.com> wrote:

>
>
> PythonException, PyObjecdt, PyScope have finallizers defined as:
>
>
>
>         ~PyObject()
>
>         {
>
>             // We needs to disable Finalizers until it's valid
> implementation.
>
>             // Current implementation can produce low probability floating
> bugs.
>
>             return;
>
>
>
>             Dispose();
>
>         }
>
>
>
> So the finalizer does not call dispose.  Does this mean that I must
> explicitly Dispose all such objects to ensure no memory leaks?
>
>
>
> Thanks,
>
>
>
> Tom
>
>
>
>
> _________________________________________________
> Python.NET mailing list - PythonDotNet at python.org
> https://mail.python.org/mailman/listinfo/pythondotnet
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/pythondotnet/attachments/20180607/94441fcb/attachment.html>

From denis.akhiyarov at gmail.com  Thu Jun  7 23:22:00 2018
From: denis.akhiyarov at gmail.com (Denis Akhiyarov)
Date: Thu, 7 Jun 2018 22:22:00 -0500
Subject: [Python.NET] Passing a C# DateTime object to a Python script
In-Reply-To: <000c01d3f825$e7ae8910$b70b9b30$@meniscus.co.uk>
References: <000c01d3f825$e7ae8910$b70b9b30$@meniscus.co.uk>
Message-ID: <CALxxJLQhF72Qei0edwmPi_jtBHZRzej9kOuXT0WmCsVnbC88mQ@mail.gmail.com>

There is a pythonnet branch with datetime conversion implementation. Is
this what you are looking for?

https://github.com/QuantConnect/pythonnet/pull/8/files


On Wed, May 30, 2018, 2:26 PM Ian Hannah <ihannah at meniscus.co.uk> wrote:

> Hi,
>
>
>
> I have a simple python script:
>
>
>
> def test(datetime_or_doy):
>
>                 print datetime_or_doy.strftime('%m/%d/%Y')
>
>
>
> and I am using Python for .NET to try and call this method as follows:
>
>
>
> dynamic np = Py.Import(@"pvlib");
>
> double d = np.irradiance.test(DateTime.Now);
>
>
>
> and I get the error:
>
>
>
> *Python.Runtime.PythonException:* 'AttributeError : 'DateTime' object has
> no attribute 'strftime''
>
>
>
> Clearly I need to pass a Python datetime object from the C# code but how
> do I do that?
>
>
>
> Thanks
>
> Ian
>
>
> _________________________________________________
> Python.NET mailing list - PythonDotNet at python.org
> https://mail.python.org/mailman/listinfo/pythondotnet
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/pythondotnet/attachments/20180607/d7ca256b/attachment.html>

From denis.akhiyarov at gmail.com  Fri Jun  8 23:54:08 2018
From: denis.akhiyarov at gmail.com (Denis Akhiyarov)
Date: Fri, 8 Jun 2018 22:54:08 -0500
Subject: [Python.NET] New pythonnet presentation from Germany
Message-ID: <CALxxJLQ1Bm7SfDBwuHcCOgJ7H6HKAdzjK_UxCO2dAapKNh88dA@mail.gmail.com>

New pythonnet presentation:

https://www.slideshare.net/mobile/StefanSchukat/introduction-to-pythonnet

https://github.com/sschukat/PyNetExamples
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/pythondotnet/attachments/20180608/5ed218f7/attachment.html>

From Steve.Ward at oxinst.com  Tue Jun 19 11:37:42 2018
From: Steve.Ward at oxinst.com (WARD Steve)
Date: Tue, 19 Jun 2018 15:37:42 +0000
Subject: [Python.NET] Cast PyObject to RoutedEventHandler
Message-ID: <EBC21482C0922248A8316300119DBCE145D4557D@UKCENMBX02.oxinst.com>

Can anyone tell me how to cast or Convert (or use a TryGet, or As whatever...), a PyObject (a Python function), to a C# RoutedEventHandler?

The Python function:

def OnStartButton(sender,args):
    #do stuff
    pass

Thanks
Steve
___________________________________________________________________________
This e-mail is confidential and is for the addressee only.   Please refer to
www.oxinst.com/email-statement<http://www.oxinst.com/email-statement> for regulatory information.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/pythondotnet/attachments/20180619/151a58df/attachment.html>

From denis.akhiyarov at gmail.com  Wed Jun 20 00:18:00 2018
From: denis.akhiyarov at gmail.com (Denis Akhiyarov)
Date: Tue, 19 Jun 2018 23:18:00 -0500
Subject: [Python.NET] Cast PyObject to RoutedEventHandler
In-Reply-To: <EBC21482C0922248A8316300119DBCE145D4557D@UKCENMBX02.oxinst.com>
References: <EBC21482C0922248A8316300119DBCE145D4557D@UKCENMBX02.oxinst.com>
Message-ID: <CALxxJLT_p3YnGk=gDkf-_OgCKp+Hb8=h8JA=S4Tn_wJgfiDLxA@mail.gmail.com>

Have you tried @clrmethod decorator?

https://github.com/pythonnet/pythonnet/blob/master/src/runtime/resources/clr.py#L54
https://github.com/pythonnet/pythonnet/blob/master/src/tests/test_clrmethod.py#L14

On Tue, Jun 19, 2018 at 10:37 AM, WARD Steve <Steve.Ward at oxinst.com> wrote:

> Can anyone tell me how to cast or Convert (or use a TryGet, or As
> whatever?), a PyObject (a Python function), to a C# RoutedEventHandler?
>
>
>
> The Python function:
>
>
>
> def OnStartButton(sender,args):
>
>     #do stuff
>
>     pass
>
>
>
> Thanks
>
> Steve
> ____________________________________________________________
> _______________
> This e-mail is confidential and is for the addressee only.   Please refer
> to
> www.oxinst.com/email-statement for regulatory information.
>
> _________________________________________________
> Python.NET mailing list - PythonDotNet at python.org
> https://mail.python.org/mailman/listinfo/pythondotnet
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/pythondotnet/attachments/20180619/4eef3a31/attachment.html>

From Steve.Ward at oxinst.com  Thu Jun 21 11:10:05 2018
From: Steve.Ward at oxinst.com (WARD Steve)
Date: Thu, 21 Jun 2018 15:10:05 +0000
Subject: [Python.NET] -|EXT|- Re:  Cast PyObject to RoutedEventHandler
In-Reply-To: <CALxxJLT_p3YnGk=gDkf-_OgCKp+Hb8=h8JA=S4Tn_wJgfiDLxA@mail.gmail.com>
References: <EBC21482C0922248A8316300119DBCE145D4557D@UKCENMBX02.oxinst.com>
 <CALxxJLT_p3YnGk=gDkf-_OgCKp+Hb8=h8JA=S4Tn_wJgfiDLxA@mail.gmail.com>
Message-ID: <EBC21482C0922248A8316300119DBCE145D4FD8B@UKCENMBX01.oxinst.com>

I tried:

import System
import System.Windows

@clr.clrmethod([System.object, System.Windows.RoutedEventArgs])
def OnStartButton(sender,args):
    #do stuff
    pass

and get: ?Cannot perform runtime binding on a null referenceAttributeError : object?

So I tried subscribing to the Click event from the Python end and that works. However, that?s not so good for me so I tried subclassing Button in C# and debugging what is passed to the Click event when subscribing from Python and sure enough, it is a RoutedEventhandler (even without the @clr.crlmethod decorator). There must be a way to pass-in the method to C#!!

Background: this is an application to support simple GUI development in Python. The C# end handles creating and displaying the GUI components which results in very simple Python:

# works in IronPython
b = app.Button("Start", OnStartButton)

# can?t use OnStartButton as argument, have to add this in Python.NET :-(
b.Click += OnStartButton

By the way I?m using Python.Net with PyScope from my own build.

Steve

From: PythonDotNet [mailto:pythondotnet-bounces+steve.ward=oxinst.com at python.org] On Behalf Of Denis Akhiyarov
Sent: 20 June 2018 05:18
To: A list for users and developers of Python for .NET
Subject: -|EXT|- Re: [Python.NET] Cast PyObject to RoutedEventHandler

Have you tried @clrmethod decorator?

https://github.com/pythonnet/pythonnet/blob/master/src/runtime/resources/clr.py#L54
https://github.com/pythonnet/pythonnet/blob/master/src/tests/test_clrmethod.py#L14

On Tue, Jun 19, 2018 at 10:37 AM, WARD Steve <Steve.Ward at oxinst.com<mailto:Steve.Ward at oxinst.com>> wrote:
Can anyone tell me how to cast or Convert (or use a TryGet, or As whatever?), a PyObject (a Python function), to a C# RoutedEventHandler?

The Python function:

def OnStartButton(sender,args):
    #do stuff
    pass

Thanks
Steve
___________________________________________________________________________
This e-mail is confidential and is for the addressee only.   Please refer to
www.oxinst.com/email-statement<http://www.oxinst.com/email-statement> for regulatory information.

_________________________________________________
Python.NET mailing list - PythonDotNet at python.org<mailto:PythonDotNet at python.org>
https://mail.python.org/mailman/listinfo/pythondotnet

___________________________________________________________________________
This e-mail is confidential and is for the addressee only.   Please refer to
www.oxinst.com/email-statement<http://www.oxinst.com/email-statement> for regulatory information.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/pythondotnet/attachments/20180621/5c24a1a4/attachment.html>