Code for printing embedded Python traceback

my_magic.py

import iris
import sys
from traceback import walk_tb


def helper(tb):
    for frame, lineno in walk_tb(tb):
        filename = frame.f_globals.get("__name__", None)
        methodname = frame.f_code.co_name
        lineno -= frame.f_code.co_firstlineno
        line = iris.gref("oddDEF")[filename, "m", methodname, 30, lineno] or ""
        yield filename, methodname, lineno, line.strip()


def print_iris_exc(file=None) -> None:
    etype, e, tb = sys.exc_info()
    print("Embedded Python Traceback (most recent call last):", file=file)
    for filename, methodname, lineno, line in helper(tb):
        print(f'  ObjectScript Class "{filename}", Method "{methodname}", Line {lineno}', file=file)
        if line:
            print(f'    {line}', file=file)
    print(f"{etype.__name__}: {e}", file=file) 
    raise e