python runtime_error ai_generated true

RuntimeError: No application configured

ID: python/starlette-runtime-error-no-app

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
0Evidence
2024-03-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.x active — — —

Root Cause

Starlette application instance is not created or not passed to the ASGI server.

generic

中文

未创建Starlette应用程序实例或未将其传递给ASGI服务器。

Workarounds

  1. 90% success Define a Starlette app instance and pass it to uvicorn. 
    from starlette.applications import Starlette
app = Starlette()
# Then run: uvicorn main:app
  2. 85% success Ensure the server command references the correct module and app variable. 
    uvicorn mymodule:app --reload

Dead Ends

Common approaches that don't work:

  1. Trying to run the server without defining the app variable. 80% fail

    The server expects an ASGI application object; without it, it fails.

  2. Using a wrong file name in the server command. 70% fail

    The server cannot find the app if the module path is incorrect.