title: UPPER_CASE naming style in __init__.py in Python Flask
body: <p>I am wondering what the proper convention is for the init file in Python Flask.
  Is there a way to format an init file in such a way in Flask that all the variables are not interpreted as constants? Currently my Pylint is saying that all the variables such as 'app' need to be renamed to be compliant with the UPPER_CASE naming style.</p>
  
  <pre><code>import logging
  from logging.handlers import RotatingFileHandler, SMTPHandler
  import os
  from flask import Flask
  from flask_sqlalchemy import SQLAlchemy
  from flask_migrate import Migrate
  from flask_login import LoginManager
  from flask_mail import Mail
  from config import Config
  
  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')
  </code></pre>