python_startup_script不会触发

Question

我在VS Code中具有以下task.json文件：

    {
    "version": "0.1.0",
    "command": "python",
    "isShellCommand": true,
    "showOutput": "always",
    "args": [
        "$PATH/dev_appserver.py",
        "--python_startup_script=$PATH/pydev_startup.py",
        "--automatic_restart=yes",
        "-A=my_project_name",
        "--max_module_instances=1",
        "--port=5001",
        "--host=localhost",
        "${workspaceRoot}/app.yaml"
    ]
}

当我运行build时，它会触发除python启动脚本以外的所有内容，我在控制台中看不到任何错误，而当我直接运行该脚本时，它就可以了，只是打印而已，就像这样：

# import ptvsd
import sys
import os

print("Running my awesome startup script!")


# Assuming that pdvsd is located in the working folder
# sys.path.append(os.getcwd())
# Fee free to change the secret and port number
# ptvsd.enable_attach(address=('0.0.0.0', 3005))
# The debug server has started and you can now use VS Code to attach to the application for debugging
print("Google App Engine has started, ready to attach the debugger")

任何提示我错了吗？谢谢！