Function get_message_lines

Lib/idlelib/run.py:231–240

Return line composing the exception message.

(typ, exc, tb)

def get_message_lines(typ, exc, tb):
    "Return line composing the exception message."
    if typ in (AttributeError, NameError):
        # 3.10+ hints are not directly accessible from python (#44026).
        err = io.StringIO()
        with contextlib.redirect_stderr(err):
            sys.__excepthook__(typ, exc, tb)
        return [err.getvalue().split("\n")[-2] + "\n"]
    else:
        return traceback.format_exception_only(typ, exc)


def print_exception():