How to get the script line number when an exception occurs

[chicknsoup]

Hello,

When running a python script in background without TPythonGUIInputOutput, it's difficult to debug when exception occurs. In this case, how to get the stacktrace/line number?

Thank you

[pyscripter]

When you execute code, say with ExecString, CheckError is called at the end which on exception updates PythoneEngine.Traceback. and raises a suitable EPythonError descendent exception.

type
  EPythonError   = class(Exception)
    public
      EName : string;
      EValue : string;
  end;

  TTracebackItem = class
  public
    FileName : string;
    LineNo : Integer;
    Context : string;
  end;

  TPythonTraceback = class
    public
      property ItemCount : Integer read GetItemCount;
      property Items[ idx : Integer ] : TTracebackItem read GetItem;
      property Limit : Integer read FLimit write FLimit;
  end;

So what you typically do is:

try
  ExecString(Code, FileName);
except
   on E: EPythonError do
     begin
       // Inspect E.EName and E.EValue
      // Inspect the GetPythonEngine.Traceback
    end;
end

[chicknsoup]

Thank you.