text: from flask import Flask
  from config import Config
  from flask_sqlalchemy import SQLAlchemy
  from flask_migrate import Migrate
  from flask_login import LoginManager
  from flask_mail import Mail
  import logging
  from logging.handlers import SMTPHandler, RotatingFileHandler
  import os
  
  
  app = Flask(__name__)
  app.config.from_object(Config)
  db = SQLAlchemy(app)
  migrate = Migrate(app, db)
  login = LoginManager(app)
  login.login_view = 'login'
  mail = Mail(app)
  
  
  from app import routes, models, errors
  
  
  if not app.debug:
      if app.config['MAIL_SERVER']:
          auth = None
          if app.config['MAIL_USERNAME'] or app.config['MAIL_PASSWORD']:
              auth = (app.config['MAIL_USERNAME'], app.config['MAIL_PASSWORD'])
          secure = None
          if app.config['MAIL_USE_TLS']:
              secure = ()
          mail_handler = SMTPHandler(
              mailhost=(app.config['MAIL_SERVER'], app.config['MAIL_PORT']),
              fromaddr='no-reply@' + app.config['MAIL_SERVER'],
              toaddrs=app.config['ADMINS'], subject='Microblog Failure',
              credentials=auth, secure=secure)
          mail_handler.setLevel(logging.ERROR)
          app.logger.addHandler(mail_handler)
  
          if not os.path.exists('logs'):
              os.mkdir('logs')
          file_handler = RotatingFileHandler('logs/microblog.log', maxBytes=10240, backupCount=10)
          file_handler.setFormatter(logging.Formatter(
              '%(asctime)s %(levelname)s: %(message)s [in %(pathname)s:%(lineno)d]'))
          file_handler.setLevel(logging.INFO)
          app.logger.addHandler(file_handler)
  
          app.logger.setLevel(logging.INFO)
          app.logger.info('Microblog startup')
  
  