Change linenumber and filename printed in exceptions like #line in C

[Gribouillis]

I don't think there is any equivalent of the #line preprocessing directive in python. What you could do is catch the exception and transform the output of traceback.format_tb() by replacing items such as ['File "sum.py" line 10 ...'] with the correct line and file reference. This supposes that you store these position informations in a separate file when you create sum.py.