选择后，设置启动文件，然后点击回车 

root@eeb0a78c1056:~#  /usr/bin/env /bin/python /root/.vscode-server/extensions/ms-python.debugpy-2024.14.0-linux-x64/bundled/libs/debugpy/adapter/../../debugpy/launcher 60741 -- -m uvicorn main:app --reload 
INFO:     Will watch for changes in these directories: ['/root']
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [2469] using StatReload
0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.
0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.
ERROR:    Error loading ASGI app. Could not import module "main".

报错了，注意看第一行跟报错信息，提示

ERROR:    Error loading ASGI app. Could not import module "main".

加载ASGI应用出错。无法导入“main”模块。 

 这种情况需要我们再调试的时候配置 launch.json 

"cwd":"${workspaceFolder}/py"

重新运行下，可见已经成功了 

 断点调试捕捉成功