An exception has occurred, use %tb to see the full traceback. SystemExit: 2

Jupyter运行argparse报错：

import argparse

parser = argparse.ArgumentParser()
parser.add_argument("x", type=int, help="the base")
parser.add_argument("y", type=int, help="the exponent")

args = parser.parse_args()

An exception has occurred, use %tb to see the full traceback.  

SystemExit: 2

搜索错误，得到一条相关文章

该文章并没解决问题，于是实验，依然报错

import argparse
parser = argparse.ArgumentParser()
parser.add_argument("echo",help="echo the string you use here")
args = parser.parse_args()
print(args.echo)

最后突然想到，应该从命令行执行.py文件，得到解决