Mailman 3 April 2013 - Python.NET

How to Compile python for .Net in VS 2010 in .Net 4.0
by Rama Nanditha Danda 08 Apr '13

08 Apr '13

Hello, I downloaded from SVN, and tried to compile it in VS2010.I have Python 2.6.6 version on 64 bit windows 7. I changed projects framework t0 4.0 I changed clrmodule.il version to 4:0:0:0 changed post build events command line to %windir%\Microsoft.NET\Framework\v4.0.30319\ilasm /nologo /dll /quiet /output="$(TargetDir)clr.pyd" "$(ProjectDir)clrmodule.il" I made above changes and rebuilded it.Python.exe is closing when i hit clr.AddReference Could anyone , please guide me here. Thank you, Rama Danda

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How to turn on console window from Windows System while debugging Embedded PythonNet app?
by Seungweon Park 05 Apr '13

05 Apr '13

Hi, Actually, my questions are 1. How to turn on console window(live) from Windows System while debugging Embedded PythonNet app? 2. How to capture python script execution output from C# code? I've been talking to Brad(a)fie.us about my issue which I can't get the output result of any python command using PythonEngine.RunString() or PythonEngine.RunSimpleString(). I've been tried to debug simple code with Python.Runtime project, but can't find how to turn on this console window, nor capture the python script execution output. What I'm trying to do is that I don't want to modify any python script when running a python script from C# code, so I have below code: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Python.Runtime; using System.Diagnostics; namespace npythontest { public class Program { static void Main(string[] args) { PyObject po; PythonEngine.Initialize(); IntPtr pythonLock = PythonEngine.AcquireLock(); po = PythonEngine.RunString("execfile('c:\\cvs\\brocade.py')"); PythonEngine.ReleaseLock(pythonLock); PythonEngine.Shutdown(); } } } and a.py prints out many string output. I want to capture this output by RunString()/RunSimpleString() method, but it doesn't return any result except 'null'. It seems it isn't for getting output. Then, while talking to Brad, his screenshot from his Mac OS with Mono displays the execution result output on an window like below, so wonder if windows environment can have same console window. Previously, Oleksii and Sharon mentioned in the thread http://mail.python.org/pipermail/pythondotnet/2011-March/001103.html, but don't know it's already implemented or not. However, I can't find how to have same environment from my window system like Brad's Mac has. So would you help me how to capture the python script output or have console window for debugging when I'm using embedded PythonNet? Thank you, Spark.

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Setting PYTHONPATH from code
by Sharon Rozenblum 05 Apr '13

05 Apr '13

Hi! Can someone tell me how to set PYTHONPATH variable in code when working with Python.Runtime.dll without changing the value in the system variables before. Thanks SHARON ________________________________ PLEASE NOTE: The information contained in this electronic mail message is intended only for the use of the designated recipient(s) named above. If the reader of this message is not the intended recipient, you are hereby notified that you have received this message in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify the sender by telephone or e-mail (as shown above) immediately and destroy any and all copies of this message in your possession (whether hard copies or electronically stored copies).

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I can't run test_engine.py with nPython.exe. Would you tell me why?
by Seungweon Park 04 Apr '13

04 Apr '13

Hi, I ran every tests from src\tests. However, I can't run runtests.py and test_module.py. test_module.py has an error message in console window and pops up "Python Console" with "Python Console has stopped working" message. Would you tell me what I need to check to run this script? It looks to me having a problem when loading a module. Thanks, Spark. C:\Automation\PythonNet\src\tests>..\..\npython test_engine.py Unhandled Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocati on. ---> System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. at Python.Runtime.Runtime.PyImport_ImportModule(String name) at Python.Runtime.PythonEngine.ImportModule(String name) in c:\Automation\PythonNet\src\runtime\pythonengine.cs:line 276 --- End of inner exception stack trace --- at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters , CultureInfo culture) at Python.Runtime.MethodBinder.Invoke(IntPtr inst, IntPtr args, IntPtr kw, MethodBase info, MethodInfo[] methodinfo) in c:\Automation\PythonNet\src\runtime\methodbinder.cs:line 356 at Python.Runtime.MethodObject.Invoke(IntPtr target, IntPtr args, IntPtr kw, MethodBase info) in c:\Automation\Python Net\src\runtime\methodobject.cs:line 63 at Python.Runtime.MethodBinding.tp_call(IntPtr ob, IntPtr args, IntPtr kw) in c:\Automation\PythonNet\src\runtime\met hodbinding.cs:line 135 at Python.Runtime.Runtime.Py_Main(Int32 argc, String[] argv) at Python.Runtime.PythonConsole.Main(String[] args) in c:\Automation\PythonNet\src\console\pythonconsole.cs:line 24 C:\Automation\PythonNet\src\tests>

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Re: [Python.NET] Would you share your idea how to call python command from embedded Python.Net?
by Seungweon Park 01 Apr '13

01 Apr '13

Also wrote a simple console application using Python.Net, But PythonEngine.RunString() returns 'null' so I got error. namespace npythontest { class Program { static void Main(string[] args) { PythonEngine.Initialize(); IntPtr gs = PythonEngine.AcquireLock(); PyObject po = PythonEngine.RunString("2+3"); Trace.WriteLine("Python: " + po.ToString()); PythonEngine.ReleaseLock(gs); PythonEngine.Shutdown(); } } } Result is Unhandled Exception: System.NullReferenceException: Object reference not set toan instance of an object. at npythontest.Program.Main(String[] args) in c:\temp\npythontest\npythontest \Program.cs:line 20 I would expect above code will give some result. I think I'm stuck. On Mon, Apr 1, 2013 at 11:32 AM, brad(a)fie.us <brad(a)fie.us> wrote: > It's running in process with your .net code. So it's the same standard > output stream. A console's WriteLine() print statement should appear in > the same place. In VS, my recollection is that there is a specific panel > you can bring up in the debugger. Or, your project may be set to spawn an > external console. Depends on your configuration. I don't know NUnit all > that well. It's possible the NUnit's runtime redirects the output stream > somewhere else as well. > > -brad > > On Apr 1, 2013, at 2:29 PM, Seungweon Park <swpark71(a)gmail.com> wrote: > > Well, would you tell me how to check the console when I execute the > PythonEngine.RunString("print 2+3")? > I'm running the line from VS2012 debugging mode, so I don't know how to > check the python console? > > On Mon, Apr 1, 2013 at 11:23 AM, brad(a)fie.us <brad(a)fie.us> wrote: > >> And have you checked the console to see if python is dutifully doing what >> you are asking it to do, which is print "5" to the output stream? That >> will not come back as a return value. You didn't ask it to give you an >> object. You asked it to print 5 to the output console. >> >> On Apr 1, 2013, at 2:21 PM, Seungweon Park <swpark71(a)gmail.com> wrote: >> >> Hi Brad, >> >> Well, I tried both 'print 2+3' and '2+3', but both returned 'null'. >> I want to have both results of execution. That is, I want to have same >> results whatever nPython.exe gives us. >> >> Thanks, >> Spark. >> >> On Mon, Apr 1, 2013 at 11:08 AM, brad(a)fie.us <brad(a)fie.us> wrote: >> >>> Yes it is supposed to work. >>> >>> But I'd point out that there is a big difference between the statements: >>> >>> print 2+3 >>> >>> and >>> >>> 2+3 >>> >>> What exactly would you expect to get back as a return from the print >>> statement? >>> >>> On Apr 1, 2013, at 2:00 PM, Seungweon Park <swpark71(a)gmail.com> wrote: >>> >>> > Hi, >>> > >>> > I've been played with Python.Net <http://python.net/> for a week, but >>> I can't find any sample to use Python.Net <http://python.net/> in >>> embedded way. I've searched many threads from the previous emailing list, >>> the result are not consistent, and looks like no solution ??. >>> > >>> > What I'm trying to do is that I want to get result (po) from C# code >>> after executing python command such as 'print 2+3' from python prompt. >>> > >>> > When I executed it from nPython.exe, it prints out 5 as I expected. >>> However, when I run this code from embedded way. it returns 'null' always. >>> Would you give me some thoughts how I can get the execution result? >>> > >>> > Basically, is this feature one of Python.Net <http://python.net/>project intended for C#(.Net) to be able to call python commands/scripts? >>> > >>> > Thank you, >>> > Spark. >>> > >>> > using NUnit.Framework; >>> > using Python.Runtime; >>> > >>> > namespace CommonTest >>> > { >>> > [TestFixture] >>> > public class PythonTests >>> > { >>> > public PythonTests() >>> > { >>> > >>> > } >>> > [Test] >>> > public void CommonPythonTests() >>> > { >>> > >>> > PythonEngine.Initialize(); >>> > >>> > IntPtr gs = PythonEngine.AcquireLock(); >>> > PyObject po = PythonEngine.RunString("print 2+3"); >>> > PythonEngine.ReleaseLock(gs); >>> > >>> > PythonEngine.Shutdown(); >>> > } >>> > } >>> > } >>> > >>> > _________________________________________________ >>> > Python.NET <http://python.net/> mailing list - PythonDotNet(a)python.org >>> > http://mail.python.org/mailman/listinfo/pythondotnet >>> >>> >> >> > >

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Would you share your idea how to call python command from embedded Python.Net?
by Seungweon Park 01 Apr '13

01 Apr '13

Hi, I've been played with Python.Net for a week, but I can't find any sample to use Python.Net in embedded way. I've searched many threads from the previous emailing list, the result are not consistent, and looks like no solution ??. What I'm trying to do is that I want to get result (po) from C# code after executing python command such as 'print 2+3' from python prompt. When I executed it from nPython.exe, it prints out 5 as I expected. However, when I run this code from embedded way. it returns 'null' always. Would you give me some thoughts how I can get the execution result? Basically, is this feature one of Python.Net project intended for C#(.Net) to be able to call python commands/scripts? Thank you, Spark. using NUnit.Framework; using Python.Runtime; namespace CommonTest { [TestFixture] public class PythonTests { public PythonTests() { } [Test] public void CommonPythonTests() { PythonEngine.Initialize(); IntPtr gs = PythonEngine.AcquireLock(); PyObject po = PythonEngine.RunString("print 2+3"); PythonEngine.ReleaseLock(gs); PythonEngine.Shutdown(); } } }

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