[Python] Flask Application

I have started to learn back - end development on Python, specifically in Flask. But always meet new problems

Project Structure

|
|
-- blog
| -- templates
| |
| -- *html files*
| -- __init__.py
| -- DataBase.py
| -- routes.py
| -- users.db
| -- user.sql
|
-- run.py


Inside run.py:

from blog import app


if __name__ == '__main__':
app.run(debug=True)


*Inside __*init __.py :

from flask import Flask
from blog import routes

app = Flask(__name__)


Inside DataBase.py :

import sqlite3


class DataBase:
def __init__(self, db, schema):
self.db = db
self.schema = schema

# Connect
def get_connection(self):
conn = sqlite3.connect(self.db)
conn.row_factory = sqlite3.Row
return conn

# Initialize
def init_db(self):
conn = sqlite3.connect(self.db)
with open(self.schema, 'r') as s:
conn.executescript(s.read())

conn.commit()
conn.close()

# Get All Data from database
def getAllData(self):
conn = self.get_connection()
users = conn.execute("""SELECT * FROM users""").fetchall()

conn.close()
return users


Inside routes.py :

from blog import app
from DataBase import DataBase
from flask import render_template

data = DataBase('users.db', 'user.sql')


@app.route('/', methods=["GET"])
@app.route('/home', methods=["GET"])
def about():
users = data.getAllData()
return render_template('home.html', users=users)


@app.route('/team/<int:user_id>', methods=["GET"])
def members(user_id):
if user_id == 1:
return render_template('mirshod.html')

elif user_id == 2:
return "Hello World"


@app.route('/team', methods=["GET", "POST"])
def team():
users = data.getAllData()
return render_template('home.html', users=users)


Before re - structuring my project everything was well, but after re - structuring I am getting error when try to run my project

Try 'python -m flask run --help' for help.

Error: While importing 'run', an ImportError was raised:

Traceback (most recent call last):
File "D:\\flaskMarket\\lib\\site-packages\\flask\\cli.py", line 218, in locate_app
__import__(module_name)
File "D:\\fastApiProject\\flaskProject\\run.py", line 1, in \<module\>
from blog import app
File "D:\\fastApiProject\\flaskProject\\blog\__init_\_.py", line 2, in \<module\>
from blog import routes
File "D:\\fastApiProject\\flaskProject\\blog\\routes.py", line 1, in \<module\>
from blog import app
ImportError: cannot import name 'app' from partially initialized module 'blog' (most likely due to a circular import) (D:\\fastApiProject\\flaskProject\\blog\__init_\_.py)

Process finished with exit code 2

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