FastAPI说缺少文件夹名称作为模块

问题描述

我有一个与pycharm中带有uvicorn的FastAPI有关的问题.我的项目具有以下结构:

I have a question related to FastAPI with uvicorn in pycharm. My project is having following structure:

LearningPy <folder name>
 |
 |-- apis <folder name>
 -----|--modelservice <folder name>
 ---------|--dataprovider.py
 ---------|--main.py
 ---------|--persondetails.py
 -----|--config.py

首先，我使用以下路径: D:\ Learnings \ apis 并运行以下代码:uvicorn main:app --reload然后它给出了错误:

First I was using following path : D:\Learnings\apis and ran following code : uvicorn main:app --reloadthen it was giving error :

Uvicorn running on http://0.0.0.0:8000 (Press CTRL+C to quit)
Started reloader process [23445]
Error loading ASGI app. Could not import module "apis".

但是，在阅读了，我已将路径更改为 D:\ Learnings \ apis \ modeservice ，但上面的错误消失了，但现在它开始引发另一个错误: ModuleNotFoundError:没有名为"apis"的模块

However, after reading suggestion from here, I have changed the path to D:\Learnings\apis\modeservice and above error gone but now it started throwing a different error :ModuleNotFoundError: No module named 'apis'

这是我的main.py和config.py代码文件:

Here are my main.py and config.py code files :

main.py-

import uvicorn
from fastapi import FastAPI
from starlette.middleware.cors import CORSMiddleware
from datetime import datetime

from apis import config
from apis.modelservice import dataprovider

app = FastAPI(debug=True)
def get_application() -> FastAPI:
    application = FastAPI(title="PersonProfile", description="Learning Python CRUD",version="0.1.0")
    origins = [
        config.API_CONFIG["origin_local_ip"],
        config.API_CONFIG["origin_local_url"]
    ]
    application.add_middleware(
        CORSMiddleware,
        allow_origins=origins,
        allow_credentials=True,
        allow_methods=["*"],
        allow_headers=["*"],
    )
    #application.include_router(processA.router)
    return application

app = get_application()

@app.get("/")
def read_root():
    return {"main": "API Server " + datetime.now().strftime("%Y%m%d %H:%M:%S")}

@app.get("/dbcheck")
def read_root():
    try:
        dataprovider.get_db().get_collection("Person")
    except Exception as e:
        return {"failed":e}
    else:
        return { "connected":True}

if __name__ == "__main__":
    uvicorn.run(app, host="0.0.0.0", port=8000, reload=True)

这是config.py-

And here is config.py--

API_CONFIG = {
    "origin_local_ip": "http://127.0.0.1:3000",
    "origin_local_url": "http://localhost:3000"
}

该项目基于React + Mongo + python(用于连接mongodb的pymongo)构建.

This project is being built on React+Mongo+python (pymongo for connecting mongodb).

谢谢.

推荐答案

您的应用程序中的问题是您的模块组织，首先我尝试了您的文件夹结构，发现与您的错误相同，我对其进行了一些调试，发现错误在于导入配置，因此我更深入地了解了为什么Python无法导入您的配置，

The problem in your application is your module organization,firstly i tried your folder structring i get the same errors as yours, i debugged it a little bit, i found the error was on importing config so i dived more deeply to understand why Python can not import your config,

我在最上面的文件夹中创建了一个脚本，以找出原因.还在打印行中的 config.py 和 modelservice.main.py

I created a script on the top folder to find out why. Also added in print line in the config.py and modelservice.main.py

print('__file__={0:<35} | __name__={1:<20} | __package__={2<20}'.format(__file__,__name__,str(__package__)))
import apis.config
import apis.modelservice.main

这是结构

apis
├── config.py
└── modelservice
    └── main.py

我在名为main.py的顶级文件夹脚本中运行该脚本，最终结果如下:

I run the script in the top folder script named main.py, It ended up with this result:

 __file__=main.py | __name__=__main__ | __package__=None
__file__=/home/yagiz/Desktop/test/apis/config.py | __name__=apis.config | package__=apis
apis.config
__file__=/home/yagiz/Desktop/test/apis/modelservice/main.py | __name__=apis.modelservice.main | __package__=apis.modelservice

感觉很奇怪，因为我应该能够相对导入，但是当我尝试导入该内容时

It felt strange because i should be able to relative import, but when i tried to import that what

from .. import config

它返回:

  File "./main.py", line 8, in <module>
    from .. import config
ImportError: attempted relative import with no known parent package

仅出于测试目的，我尝试了这种结构，也使用了绝对导入 导入配置:

Just for the testing it out i tried this structure, also i used absolute import import config:

apis/
├── modelservice
    ├── config.py
    ├── main.py

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [14155] using statreload
__file__=./main.py  | __name__=main | __package__=
__file__=./config.py  | __name__=config   | __package__= config
INFO:     Started server process [14157]
INFO:     Waiting for application startup.
INFO:     Application startup complete.

一切工作都很好，所以问题在于模块的组织以及如何导入事物，因此请再次查看它们.

Everything worked fine like that, so the problem is with your module organization and how you importing things so take a look at them again.

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