How to get the offending line when using IronPython with C#/.NET as host, on a runtime error?

Question

Confused by the title? Let me explain: I do execute a python script, within a .NET process (my C# application being the host), using IronPython:

ScriptEngine python = Python.CreateEngine();
ScriptSource pyFromFileSource = python.CreateScriptSourceFromString(script);
CompiledCode pyFromFileCode = pyFromFileSource.Compile();
ScriptRuntime runtime = engine.Runtime;
ScriptScope scope = runtime.CreateScope(); //get a scope where we put in the stuff from the host
scope.SetVariable("lab", this); //allow usage of this class in the script
script.Execute(scope);

The code shown above is running in a background thread (using the Task class). The script contains an error, which causes an IronPython.Runtime.Exceptionis.TypeErrorException to bubble up. I can catch this, and get the message.
But how to get the script line or line number that causes the exception?

Answer 1

You can can call PythonOps.GetDynamicStackFrames on the exception and get the line numbers from the DynamicStackFrame objects.

Answer 2

This answer provides a means to format an exception caught from IronPython code into a string that contains more useful information such as line numbers and the Python call stack:

engine.GetService<ExceptionOperations>().FormatException(exception);