Keyerror: None Flask

Question

Hello, I’d like your help, because I’m trying to understand why you don’t perform!?

config.py

import os
import random, string


class Config(object):
  CSRF_ENABLED = True
  SECRET = '87725E7FC56B98E656AB7A4AEF9D01CAAA625FCF2F7133A48AD42F500E939884'
  TEMPLATE_FOLDER = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'templates')
  ROOT_DIR = os.path.dirname(os.path.abspath(__file__))
  APP = None


class DevelopmentConfig(Config):
  TESTING = False
  DEBUG = True
  IP_HOST = 'localhost'
  PORT_HOST = 8000
  URL_MAIN = 'http://%s:%s/' % (IP_HOST, PORT_HOST)


class TestingConfig(Config):
  TESTING = True
  DEBUG = True
  IP_HOST = 'localhost'  # Aqui geralmente é um IP de um servidor na nuvem e não o endereço da máquina local
  PORT_HOST = 5000
  URL_MAIN = 'http://%s:%s/' % (IP_HOST, PORT_HOST)


class ProductionConfig(Config):
  DEBUG = False
  TESTING = False
  IP_HOST = 'localhost'  # Aqui geralmente é um IP de um servidor na nuvem e não o endereço da máquina local
  PORT_HOST = 8080
  URL_MAIN = 'http://%s:%s/' % (IP_HOST, PORT_HOST)


app_config = {
  'development': DevelopmentConfig(),
  'testing': TestingConfig(),
  'production': ProductionConfig()
}

app_active = os.getenv('FLASK_ENV')

app py.

# -*- coding: utf-8 -*-
from flask import Flask

# config import
from config import app_config, app_active

config = app_config[app_active]


def create_app(config_name):
  app = Flask(__name__, template_folder='templates')

  app.secret_key = config.SECRET
  app.config.from_object(app_config[config_name])
  app.config.from_pyfile('config.py')

  @app.route('/')
  def index():
    return 'Meu primeiro run'

  return app

run py.

from importlib import reload

from app import create_app
from config import app_config, app_active

config = app_config[app_active]

config.APP = create_app(app_active)

if __name__ == '__main__':
  config.APP.run(host=config.IP_HOST, port=config.PORT_HOST)

When I perform with python run.py

the following error is returned.

Traceback (most recent call last):
  File "D:/Programação/Projetos/GitHub/python/flask_livro/run.py", line 4, in <module>
    from app import create_app
  File "D:\Programação\Projetos\GitHub\python\flask_livro\app.py", line 7, in <module>
    config = app_config[app_active]
KeyError: None

Would you kindly help me resolve?