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

[misaka10843]

First Check

• I added a very descriptive title here.
• I used the GitHub search to find a similar question and didn't find it.
• I searched the FastAPI documentation, with the integrated search.
• I already searched in Google "How to X in FastAPI" and didn't find any information.
• I already read and followed all the tutorial in the docs and didn't find an answer.
• I already checked if it is not related to FastAPI but to Pydantic.
• I already checked if it is not related to FastAPI but to Swagger UI.
• I already checked if it is not related to FastAPI but to ReDoc.

Commit to Help

• I commit to help with one of those options 👆

Example Code

from fastapi import FastAPI
import comic.CreateComic
from Routers import ComicRouter
from database import Database

app = FastAPI()
db = Database()

Description

After importing comic.CreateComic, the Error loading ASGI app appeared Could not import module 'main'
May I ask if the import method is incorrect?
I tried several different methods, but none of them worked

Operating System

Windows

Operating System Details

Windows 11 Pro 22624.1755

FastAPI Version

0.100.0

Python Version

Python 3.10.11

Additional Context

[mikeedjones]

What is BaseModel.py - there's an important Pydantic class with the same name and that could be causing some issues.

[misaka10843]

I have tried from comic import ComicCreate, but it still prompts me to send the code and the detection results of pylint to ChatGPT, and then use the method provided by GPT to report the same error🤣

[misaka10843]

https://github.com/misaka10843/test-api
This is my repository

The abnormal situation is in the following two lines. After deleting these two lines, an error message will be reported and resolved

https://github.com/misaka10843/test-api/blob/865d305a19390ab7275bc03cacadb277e9d0bef0/Routers/ComicRouter.py#L2-L3

[mikeedjones]

pardon? By language server I mean Pylance or whatever the pycharm equivalent is.

[mikeedjones]

You have a circular import - line 5 in CreateComic.py imports from mainfrom main import db - causing an error.

[misaka10843]

I see. I didn't check carefully🤣
Thank you very much for helping me find the error💕

[mikeedjones]

You're welcome. Seems like uvicorn dying quietly and not displaying the stack trace is an issue. Worth seeing if there's an open issue on the uvicron repo.

[Kludex]

No open issue there. You can open one with an MRE.

Uvicorn maintainer here.

[mikeedjones]

opened a discussion encode/uvicorn#2034

[estosito999]

help mee I get the same error