xppl/app/__init__.py

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from marshmallow import Schema, fields, ValidationError, pre_load
import os
from werkzeug.utils import secure_filename

basedir = os.path.abspath(os.path.dirname(__file__))

UPLOAD_FOLDER = os.path.join(basedir, 'uploads')
UPLOAD_FOLDER_COVER = os.path.join(basedir, 'uploads/cover')
ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif'])

app = Flask(__name__)

app.config['SECRET_KEY'] = 'super secret key'
#app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////tmp/mydatabase.db'
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///' + os.path.join(basedir, 'mydatabase.db')
db = SQLAlchemy(app)

app.config.from_object(__name__)
from app import views