jupyter notebook安装插件，代码补全

在根据这个博客上的内容，给jupyter notebook时：
https://blog.csdn.net/weixin_37595559/article/details/81540482

1. 首先安装nbextensions

pip install jupyter_contrib_nbextensions -i https://pypi.mirrors.ustc.edu.cn/simple
jupyter contrib nbextension install --user

2. 安装nbextensions_configurator

pip install --user jupyter_nbextensions_configurator 
jupyter nbextensions_configurator enable --user

在我运行jupyter notebook的时候，并没有出现nbextension，而出报错：

Error loading server extension jupyter_nbextensions_configurator
    Traceback (most recent call last):
      File "/home/bryce1010/anaconda3/lib/python3.6/site-packages/notebook/notebookapp.py", line 1481, in init_server_extensions
        mod = importlib.import_module(modulename)
      File "/home/bryce1010/anaconda3/lib/python3.6/importlib/__init__.py", line 126, in import_module
        return _bootstrap._gcd_import(name[level:], package, level)
      File "<frozen importlib._bootstrap>", line 994, in _gcd_import
      File "<frozen importlib._bootstrap>", line 971, in _find_and_load
      File "<frozen importlib._bootstrap>", line 953, in _find_and_load_unlocked
    ModuleNotFoundError: No module named 'jupyter_nbextensions_configurator'

后来，我查阅*后，得知一条命令：

python -m pip install --user jupyter_contrib_nbextensions

问题解决！！！