[IronPython] Debugging support PythonEngine

Kristof Wagemans kristof.wagemans at gmail.com
Thu Jul 27 15:14:46 CEST 2006

I have been experimenting with the debugging support for the PythonEngine.
When I use the following code I have several problems.


PythonEngine _pe;

EngineOptions options = new EngineOptions();

options.ClrDebuggingEnabled = true;

_pe = new PythonEngine(options);

_pe.ExecuteFile(@"  <script>  ");



x = 1

y = 2


def Add(a, b):

    return a + b


z = Add(x, y)

print z



I opened the script file in Visual Studio and placed a breakpoint at the
beginning of the file. The application runs and breaks at the correct
location. Stepping through the lines works, but I cannot see any values of

When I try to step into the function I get a notification that there is no
source code available and I must show the disassembly. After I step several
times through the assembly I can return to the source code.

I have looked at debugging ipy.exe and there I can see the variables, but I
still have the problem with stepping into a function. In ipy.exe the script
file is executed in a different way. Using the same method I can also see
the variables. I apparently don't need to set ClrDebuggingEnabled.


PythonEngine _pe;

_pe = new PythonEngine();

OptimizedEngineModule engineModule = _pe.CreateOptimizedModule(@"  <script>
", "__main__", true);



Are you required to use an OptimizedEngineModule to be able to debug? Am I
forgetting some settings for debugging? Can I step directly into a function
without getting into the assembly?

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