From khg at power21.co.kr  Thu Feb  5 10:52:35 2015
From: khg at power21.co.kr (=?EUC-KR?B?sejH2LHi?=)
Date: Thu, 05 Feb 2015 18:52:35 +0900
Subject: [Python.NET] [Python for .NET] question: How to correctly clean
 up MemoryStream object
In-Reply-To: <54D33C9F.4040806@power21.co.kr>
References: <54D33C9F.4040806@power21.co.kr>
Message-ID: <54D33D63.9050908@power21.co.kr>

Hi,

I have a MemoryStream created from Python (3.4)
*memory_stream = MemoryStream(data_size)*
and pass it to a C# library function to get data.
*self.the_library.Read(memory_stream)*
This definitely works. The problem is, python.exe's memory usage
increases over time.
Calling *memory_stream.Dispose()* and *memory_stream.Close()* doesn't help.
What am I missing?

Thanks in advance.

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From cameron.hayne at introspect.ca  Sat Feb 21 00:21:49 2015
From: cameron.hayne at introspect.ca (Cameron Hayne)
Date: Fri, 20 Feb 2015 18:21:49 -0500
Subject: [Python.NET] avoiding runtime error R6034
Message-ID: <C67C760C-592F-4560-B006-563BA7A2E276@introspect.ca>

I?ve started using the version of PythonDotNet from https://github.com/renshawbay/pythonnet
to call my Python modules from C#.
I encountered the Microsoft runtime error R6034 which
(according to <http://stackoverflow.com/questions/14552348/runtime-error-r6034-in-embedded-python-application>)
is caused by extra copies of the file "msvcr90.dll? in folders on the Windows execution PATH.
I worked around this problem by calling the following function in my initialization code.

def cleanWindowsPathOfCRuntimeDll():
    """
    This function changes the Windows execution PATH environment variable
    so as to exclude any folders that contain the file "msvcr90.dll".
    Apparently the existence of this file in the PATH causes runtime error R6034
    when using embedded Python.
    See: http://stackoverflow.com/questions/14552348/runtime-error-r6034-in-embedded-python-application
    """
    folderPaths = os.environ['path'].split(';')
    toExclude = list()
    for folderPath in folderPaths:
        if "msvcr90.dll" in map((lambda x:x.lower()), os.listdir(folderPath)):
            toExclude.append(folderPath)
            debugMsg(0, "excluding folder '%s' from PATH" % folderPath)
    os.environ['path'] = ';'.join([x for x in folderPaths
                                              if x not in toExclude])
# ??????????????????????????????????????

--
Cameron Hayne
cameron.hayne at introspect.ca




From aleksberland at gmail.com  Sun Feb 22 21:22:31 2015
From: aleksberland at gmail.com (Aleks Berland)
Date: Sun, 22 Feb 2015 15:22:31 -0500
Subject: [Python.NET] (no subject)
Message-ID: <CAH79Ot2yJLurRZ1_==58hHXKN+pO1YniWEQVaWWqKR4hBTSk=Q@mail.gmail.com>

Hi All,
I'm new to the list and to Python.NET

I am running the latest from Git, on Mono in Ubuntu 14.04.

I am working with NHibernate Database Configuration code,
I am experiencing problems trying to explicitly state generic
parameter (NHSearch)  so the C# strong type syntax make it possible infer
from NHSearch.Instance.

The offending line in pythonnet is:

db_adapter =
DatabaseAdapter.Configure.DatabaseConfiguration(conn_sql).SearchProvider[NHSearch](NHSearch.Instance)


And I get this back:


Unhandled Exception:
System.ArgumentException: GCHandle value cannot be zero
  at System.Runtime.InteropServices.GCHandle.op_Explicit (IntPtr value)
[0x00000] in <filename unknown>:0
  at Python.Runtime.ManagedType.GetManagedObject (IntPtr ob) [0x00000] in
<filename unknown>:0
  at Python.Runtime.Runtime.PythonArgsToTypeArray (IntPtr arg, Boolean
mangleObjects) [0x00000] in <filename unknown>:0
  at Python.Runtime.MethodBinding.tp_call (IntPtr ob, IntPtr args, IntPtr
kw) [0x00000] in <filename unknown>:0
  at (wrapper native-to-managed) Python.Runtime.MethodBinding:tp_call
(intptr,intptr,intptr)
  at (wrapper managed-to-native) Python.Runtime.Runtime:Py_Main
(int,string[])
  at Python.Runtime.PythonConsole.Main (System.String[] args) [0x00000] in
<filename unknown>:0
[ERROR] FATAL UNHANDLED EXCEPTION: System.ArgumentException: GCHandle value
cannot be zero
  at System.Runtime.InteropServices.GCHandle.op_Explicit (IntPtr value)
[0x00000] in <filename unknown>:0
  at Python.Runtime.ManagedType.GetManagedObject (IntPtr ob) [0x00000] in
<filename unknown>:0
  at Python.Runtime.Runtime.PythonArgsToTypeArray (IntPtr arg, Boolean
mangleObjects) [0x00000] in <filename unknown>:0
  at Python.Runtime.MethodBinding.tp_call (IntPtr ob, IntPtr args, IntPtr
kw) [0x00000] in <filename unknown>:0
  at (wrapper native-to-managed) Python.Runtime.MethodBinding:tp_call
(intptr,intptr,intptr)
  at (wrapper managed-to-native) Python.Runtime.Runtime:Py_Main
(int,string[])
  at Python.Runtime.PythonConsole.Main (System.String[] args) [0x00000] in
<filename unknown>:0



Not sure how/where to start to debug this. Any tips would be helpful!
I would be happy to give more details if needed of course, but I am not
sure what will help at this stage, so let me know.

Regards,

- Aleks
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