Those numbers in your exception message are pointers to Python Strings
in the unmanaged side. Use this:
catch (PythonException ex)
{
String typ = new PyObject(ex.Type).ToString();
String val = new PyObject(ex.Value).ToString();
String trace = new PyObject(ex.Traceback).ToString();
MessageBox.Show(typ + "\n" + val + "\n" + trace);
}
I'm not sure of the answer to any of your other questions.
> -----Original Message-----
> From: Barrett, Joey [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, June 06, 2007 9:48 PM
> To: Karpenstein, Nissim (C-BASS); Michael Eddington;
> pythondotnet@python.org
> Subject: RE: [Python.NET] Could you tell me how to call
> python from c#?
>
> Thanks for working through this with me. Lots of questions,
> but I promise to write a nice HOW-TO on all this once I get
> it working from .NET.
>
> ...
> if (module == null)
> {
> throw new PythonException();
> }
> catch (PythonException e)
> {
> result += e.Message + "\n" + e.StackTrace + "\n" + e.Type + "\n"
> + e.Value + e.Traceback;
> }
>
> result.toString() yields:
>
> Exception of type 'Python.Runtime.PythonException' was thrown. at
> PythonTester.PythonTest2() in C:\Documents and
> Settings\user\workspace\PythonTester.cs:line 180 75319696
> 7542755275491888
>
> 1. How do I get the error from the interpreter? (NOTE: I am
> not "finalizing/shutting-down" the interpreter so the errors should be
> available)
>
>
> From a thread titled "[Python.NET] embedding in aspx problem"
> (http://mail.python.org/pipermail/pythondotnet/2004-May/000154.html),
> the user fixed the problem by adding a fully qualified path
> to the sys.path.
>
> My sys.path:
>
> 'C:\\Documents and
> Settings\\jbarrett\\Desktop\\Kryptonite\\Kryptonite\\bin\\pyth
> on23.zip',
> '.\\DLLs', '.\\lib', '.\\lib\\plat-win', '.\\lib\\lib-tk',
> 'C:\\WINDOWS\\Microsoft.NET\\Framework\\v2.0.50727'
>
> 2. What is python23.zip? I don't see it anywhere.
>
> 3. Are the relative paths (ie. '.\\DLLs', '.\\lib', ...)
> supposed to live off the root of the interpreter?
>
> 4. What is
> 'C:\\WINDOWS\\Microsoft.NET\\Framework\\v2.0.50727' on the path for?
>
> Thanks again for any help you can offer.
>
> Joey J. Barrett
> Investment Technology Group, Inc.
>
>
>
> -----Original Message-----
> From: Karpenstein, Nissim (C-BASS)
> [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, June 06, 2007 12:10 PM
> To: Barrett, Joey; Michael Eddington; pythondotnet@python.org
> Subject: RE: [Python.NET] Could you tell me how to call
> python from c#?
>
> You can get the error message from ImportModule like this:
>
> // After ImportModule
> if (module == null)
> throw new PythonException()
>
> That will check the error codes from the Python Interpreter
> and populate fields in the Exception.
> The python interpreter being executed is the .dll version
> probably in your windows\system32 directory.
>
> I would try first to get the environemtn working the same
> outside of vs.net. Add c:\test to your pythonpath and make
> sure you can call the method from the python prompt in a
> shell window. Then, if that's working, restart your vs and
> it should work. I'm not sure how to modify the pythonpath on
> the fly or if that's really the problem.
>
>
>
> > -----Original Message-----
> > From: Barrett, Joey [mailto:[EMAIL PROTECTED]
> > Sent: Wednesday, June 06, 2007 3:02 PM
> > To: Michael Eddington; Karpenstein, Nissim (C-BASS);
> > pythondotnet@python.org
> > Subject: RE: [Python.NET] Could you tell me how to call python from
> > c#?
> >
> > Thank you for all the help.
> >
> > Loading a module located at C:\test\testModule.py is causing the
> > following error: "Object reference not set to an instance of an
> > object."
> >
> > TestModule.py
> >
> > def testMethod(self, options = {}):
> > m = {}
> > return m
> >
> >
> > The last line of this code throws the error:
> >
> > // setting up PYTHONPATH
> > System.Environment.SetEnvironmentVariable("PYTHONPATH",@"C:\test;");
> > PythonEngine.Initialize();
> > PyObject module = PythonEngine.ImportModule("testModule");
> > PyObject returnObject = module.InvokeMethod("testMethod", new
> > PyTuple());
> >
> >
> >
> > Is this the correct way to import a module or can a fully specified
> > path be used? For example:
> >
> > PythonEngine.ImportModule("C:\test\testModule.py");
> >
> >
> > PythonEngine.Initialize() initializes the interpreter --- what
> > interpreter is initialized? If Python is on the PATH, is that the
> > interpreter initialized?
> >
> >
> > Thanks, I really appreciate any tips.
> >
> > Joey J. Barrett
> > Investment Technology Group, Inc.
> >
> >
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED] On Behalf Of Michael
> > Eddington
> > Sent: Wednesday, June 06, 2007 11:09 AM
> > To: pythondotnet@python.org
> > Subject: Re: [Python.NET] Could you tell me how to call python from
> > c#?
> >
> > Yes, you can set the PYTHONHOME variable from .net prior to calling
> > the initialize. Many of the python runtimes set registry
> keys or are
> > located in default locations.
> >
> > mike
> >
> > On 6/6/07, Barrett, Joey <[EMAIL PROTECTED]> wrote:
> > >
> > > Thank you for your response, this is helpful.
> > >
> > > The methods called usually return lists or dictionaries and
> > sometimes
> > > other types too that need to be used within the C#. In
> the example
> > you
> > > provided the return value from InvokeMethod(), is a string
> > "fromPython",
> > > but I noticed InvokeMethod() actually returns a PyObject.
> > >
> > > How can I look at that PyObject and extract the returned values?
> > >
> > > The classes I use import many modules from a number of
> locations on
> > disk
> > > that aren't known to the interpreter.
> > >
> > > Is there a way to add to the PYTHONPATH programmatically
> in C# using
> > the
> > > Python for .net library, or would it be required to write
> a wrapper
> > > python module that adds to the path first? Maybe there is
> > another way
> > > to handle this?
> > >
> > > Thank you again
> > >
> > > Joey J. Barrett
> > > Investment Technology Group, Inc.
> > >
> > > -----Original Message-----
> > > From: Karpenstein, Nissim (C-BASS)
> > > [mailto:[EMAIL PROTECTED]
> > > Sent: Wednesday, June 06, 2007 6:37 AM
> > > To: Barrett, Joey; pythondotnet@python.org
> > > Subject: RE: [Python.NET] Could you tell me how to call
> python from
> > c#?
> > >
> > > I tried to post this to the list yesterday but it bounced
> > because of
> > > address issues...hopefully this will work:
> > >
> > > If you want to execute a python program from c-sharp you
> > can just use
> > > System.Diagnostics.Process to execute python.exe and you
> don't need
> > > python for .net.
> > >
> > > Python for .net is more appropriate for if you want to execute a
> > python
> > > function or create an instance of a python object and then
> > run methods
> > > and access attributes from your C# program.
> > >
> > > The example you linked to is OK, except that he modified the
> > > Python.Runtime.Dll which is not necessary.
> > >
> > > If you had a Hello.py with a function called hello Like this:
> > >
> > > def hello():
> > > return 'hello'
> > >
> > >
> > > You could do this in C#:
> > >
> > > PythonEngine.Initialize();
> > > PyObject helloModule = PythonEngine.ImportModule("Hello");
> > > String fromPython = helloModule.InvokeMethod("hello", new
> > > PyTuple()).ToString(); PythonEngine.Shutdown();
> > >
> > > // now fromPython = "hello"
> > >
> > > If your function takes an argument:
> > >
> > > def returnArg(arg):
> > > return arg
> > >
> > > PythonEngine.Initialize();
> > > PyObject helloModule = PythonEngine.ImportModule("Hello");
> > > String fromPython = helloModule.InvokeMethod("returnArg", new
> > > PyObject[1] {new PyString("Test")}).ToString();
> > PythonEngine.Shutdown();
> > >
> > > // now fromPython = "test"
> > >
> > > ________________________________
> > >
> > > From: [EMAIL PROTECTED]
> > > [mailto:[EMAIL PROTECTED] On Behalf Of
> Barrett, Joey
> > > Sent: Tuesday, June 05, 2007 8:11 PM
> > > To: pythondotnet@python.org
> > > Subject: Re: [Python.NET] Could you tell me how to
> > call python
> > > from c#?
> > >
> > >
> > >
> > > Hi,
> > >
> > >
> > >
> > > I also would be very interested in seeing some examples to
> > "call
> > > python from c#" using "Python for .NET". I have dug around
> > Google and
> > a
> > > number of forums---I can't find anything except the post
> from below.
> > I
> > > really hope I'm not missing the obvious somewhere.
> > >
> > >
> > >
> > > IronPython is great but my needs require using a few c++
> > > extensions compiled for CPython (that can't be recompiled).
> > >
> > >
> > >
> > > Also thanks in advance,
> > >
> > >
> > >
> > > Joey J. Barrett
> > >
> > > Investment Technology Group, Inc.
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Hello, PythonNet!
> > >
> > >
> > > I'm looking for some sample code to call python from C#.
> > > Actually, I'd like to execute python program(let say
> > 'Hello.py')
> > > from C#
> > > with parameters.
> > > Actually, I'm a newbie at both of languages. So, could you
> > give
> > > sample
> > > source code? I was looking for some guide or source for
> > several
> > > days,
> > > but I couldn't find it. What I've got so far from
> > googling is
> > >
> > >
> > http://mail.python.org/pipermail/pythondotnet/2003-November/00
> > 0037.html,
> > >
> > > but I can't understand it and old one.
> > >
> > > Thank you in advance.
> > > Seungweon.
> > >
> > >
> > >
> > >
> > >
> > >
> > >
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