Import Error in flask application

Question

I have an application. Below is o/p of tree command -

app
|-- main
|   |-- lib
|   |   |-- constants.py
|   |   |-- helper.py
|   |   `-- __init__.py
|   `-- src
|       |-- __init__.py
|       `-- web.py

web.py

from flask import Flask, request  
app = Flask(__name__)

from lib.helper import endpoints
.....
Some code
.....
if __name__ == '__main__':
     app.run('0.0.0.0', 5433, debug=True)

I am getting this error

ImportError: No module named lib.helper.

where am I doing wrong?

Answer 1

from flask import Flask, request  
app = Flask(__name__)

import sys
from os.path import abspath, dirname
sys.path.insert(0, dirname(dirname(abspath(__file__))))

from lib.helper import endpoints
.....
Some code
.....
if __name__ == '__main__':
    app.run('0.0.0.0', 5433, debug=True)

Answer 2

Lib模块位于src文件夹之外，需要向上一个文件夹并使用该模型。

from ..lib.helper

Answer 3

否则，一个完全限定的命名空间为

from app.main.lib