CODEWITHSUNDEEP
pythonflaskpython-import
kstullich
kstullich

Reputation: 681

Importing from __init__ in Flask

I am wanting to import a class from my __init__ file. But I am unsuccessful in importing it. This is my directory structure

/fitBody_app
  /fitBody
    /static
    /templates
    __init__.py
    models.py
    views.py

run.py

These are all the imports of my __init__.py file:

import os

from flask import Flask
from flask_admin import Admin
from flask_admin.contrib.sqla import ModelView
from flask_sqlalchemy import SQLAlchemy
from wtforms import fields, widgets

from fitBody.views import my_app
from flask_bootstrap import Bootstrap

app = Flask(__name__)
db = SQLAlchemy(app)

These are all my imports in my views.py file:

import bcrypt
from flask import flash, redirect, render_template, request, session, Blueprint, url_for
from fitBody.models import RegistrationForm
from fitBody.models import cursor, conn
from fitBody import db

my_app = Blueprint('fitBody', __name__)

<......>

When I try to run the file, this is my traceback:

Traceback (most recent call last):
  File "/Users/kai/github-projects/fitBody_app/run.py", line 1, in <module>
    from fitBody import app
  File "/Users/kai/github-projects/fitBody_app/fitBody/__init__.py", line 9, in <module>
    from fitBody.views import fitBody
  File "/Users/kai/github-projects/fitBody_app/fitBody/views.py", line 8, in <module>
    from fitBody import db
ImportError: cannot import name 'db'

I had thought that since I am importing from within the same folder that it is possible to just give the import like this.

How would I go about importing the db object from the __init__.py file?

Upvotes: 0

Views: 8615

Answers (2)

metmirr
metmirr

Reputation: 4302

Since views.py use db the import statement should come after db defination. Or for better design move blueprints to another file, and just keep blueprint's in that file:

#__init__.py
app = Flask(__name__)
db = SQLAlchemy(app)

from fitBody.views import my_app

Upvotes: 3

Faisal
Faisal

Reputation: 175

It doesn't have anything to do with importing from an __init__.py file. Your views.py is importing from your __init__.py file, and __init__.py file is importing from your views.py, which is an import cycle. I am not sure how your models.py looks like, but how about you initialize db in models.py and have both __init__.py and views.py import from models.py

Upvotes: 1

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