vscode python 无法引入上层目录解决

在vscode 中.vscode 配置如下
{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
“version”: “0.2.0”,
“configurations”: [
{
“name”: “Python: Current File”,
“type”: “python”,
“request”: “launch”,
“program”: “$file","console":"integratedTerminal","justMyCode":false,"cwd":"${fileDirname}”,
“env”: {“PYTHONPATH”: “${cwd}”}
}
]
}