mllog.py 文件源码

def warn_with_traceback(message, category, filename, lineno, line=None):
    """
    copied from:
    http://stackoverflow.com/questions/22373927/get-traceback-of-warnings
    """
    traceback.print_stack()
    log = sys.stderr
    log.write(warnings.formatwarning(
        message, category, filename, lineno, line))