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+--- Thread: flask issues with app structuring (/thread-24415.html)
flask issues with app structuring - sidk23396 - Feb-12-2020
Hi all,
I am new to this forum. I recently started working on my first flask application. I am having some issues with imports in my project. My project structure is as follows:
<project>
│ amazon_scraper_app.db
│ README.md
│ run_server.py
│ server_deprecated.py
│ __init__.py
│
│
├───amazon_scraper_app
│ │ additional_routes.py
│ │ api_resource_models.py
│ │ customExceptions.py
│ │ database_models.py
│ │ database_utilities.py
│ │ models.py
│ │ server.py
│ │ server_utilities.py
│ │ test.db
│ │ __init__.py
│
│
├───config
│ │ config.py
│ │ settings.py
│
I have my class in the amazon_scraper_app.__init__ module. I initialize an object of my class and import that object to all other files such as amazon_scraper_app.database_utilities etc.. I am importng the my_app object from amazon_scraper_app.__init__ to amazon_scraper_app.database_utilities to access the 'db' of the flask app which is just SQLAlchemy(flask_app). I am also importing methods from amazon_scraper_app.database_utilities to amazon_scraper_app.api_resource_models. The classes in amazon_scraper_app.api_resource_models are imported in amazon_scraper_app.__init__ to serve as REST API handlers to the flask server. This causes some kind of loop of imports and I am stuck with an error like this:
C:\Users\siddh\AppData\Local\Programs\Python\Python37-32\python.exe C:/Users/siddh/Documents/Python/amazon-scraper/run_server.py
Traceback (most recent call last):
File "C:/Users/siddh/Documents/Python/amazon-scraper/run_server.py", line 1, in <module>
from amazon_scraper_app import my_app
File "C:\Users\siddh\Documents\Python\amazon-scraper\amazon_scraper_app\__init__.py", line 5, in <module>
from amazon_scraper_app.api_resource_models import AmazonProductListResource, AmazonProductResource, \
File "C:\Users\siddh\Documents\Python\amazon-scraper\amazon_scraper_app\api_resource_models.py", line 3, in <module>
from amazon_scraper_app.database_utilities import get_products
File "C:\Users\siddh\Documents\Python\amazon-scraper\amazon_scraper_app\database_utilities.py", line 1, in <module>
from amazon_scraper_app.database_models import AmazonProduct, db, AmazonProductPrice
File "C:\Users\siddh\Documents\Python\amazon-scraper\amazon_scraper_app\database_models.py", line 1, in <module>
from amazon_scraper_app import my_app
ImportError: cannot import name 'my_app' from 'amazon_scraper_app' (C:\Users\siddh\Documents\Python\amazon-scraper\amazon_scraper_app\__init__.py)
Please help as I am out of ideas on how I can resolve this. I am very new this.
Thanks!
Sid
RE: flask issues with app structuring - Larz60+ - Feb-12-2020
see: https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-xv-a-better-application-structure