upr_espera/app/__init__.py

import os
from flask import Flask

def create_app(test_config=None):
    app = Flask(__name__, instance_relative_config=True)
    app.config.from_mapping(
        SECRET_KEY='dev',
        DATABASE=os.path.join(app.instance_path, 'upr_espera.sqlite'),
    )

    if test_config is None:
        app.config.from_pyfile('config.py', silent=True)
    else:
        app.config.from_mapping(test_config)

    try:
        os.makedirs(app.instance_path)
    except OSError:
        pass

    from . import db
    db.init_app(app)

    @app.route('/', methods=('GET', 'POST'))
    def index():
        if request.method == 'POST':
            cName = request.form['cName']
            cEmail = request.form['cEmail']
            station_name = request.form['station']
            error = None

            if not cName:
                error = 'Name is required.'
            elif not cEmail:
                error = 'Email is required'
            else:
                db = get_db()
                station_id = db.execute(
                    'SELECT s_id FROM station WHERE nombre_empleado=?',
                    (station_name,)
                ).fetchone()
                db.execute(
                    'UPDATE station SET last_turn = last_turn + 1 WHERE s_id=?',
                    (station_id,)
                )
                turn = db.execute(
                    'SELECT last_turn FROM station WHERE s_id=?',
                    (station_id,)
                ).fetchone()
                db.execute(
                    'INSERT INTO turno (cName, cEmail, turn, timeArrival, station)'
                    ' VALUES (?, ?, ?, ?)',
                    (cName, cEmail, turn, 'testin', station_id)
                )
            db.commit()

    return app