vscode python format

1. 下载插件 Black Formatter
2. 配置 .vscode/settings.json
   '''
   {
   "python-envs.defaultEnvManager": "ms-python.python:conda",
   "python-envs.defaultPackageManager": "ms-python.python:conda",
   "python-envs.pythonProjects": [],
   "black-formatter.args": [
   "--line-length", "150"
   ]
   }
   '''
3. vim GG=G