proper python error formatting without necessary non-zero exit code.

format_error.py

from traceback import format_exception


def format_error(e: Exception, limit: int = 3):
    """Format exception as a string.

    Args:
        e (Exception): Raised exception object.
        limit (int): limit of error call stack lines to be included in the formatted string.
    """
    e_fmt = format_exception(type(e), e, tb=e.__traceback__, limit=limit)
    return "\n".join(e_fmt)