def format_exception ( e ) : from . utils . printing import fill return '\n' . join ( fill ( line ) for line in traceback . format_exception_only ( type ( e ) , e ) )
python how to make traceback error
Returns a string containing the type and text of the exception .
def format_exception(e):
    """Returns a string containing the type and text of the exception.

    """
    from .utils.printing import fill
    return '\n'.join(fill(line) for line in traceback.format_exception_only(type(e), e))