flask-mega-tutorial and I found some error when I execute my code. first I have init.py from flask import Flask app = Flask(__name__) from app import routes then routes.py from app import app @app.route('/') @app.route('/index') def index(): return "Hello, World!" And last I have microblog.py to execute my code from app import app app.run(debug=True) but when I execute FLASK_APP = microblog.py then flask run, I found this Serving Flask app "microblog.py" Environment: production WARNING: Do not use the development server in a production environment. Use a production WSGI server instead. Debug mode: off Usage: flask run [OPTIONS] Error: While importing "microblog", an ImportError was raised: Traceback (most recent call last): File "e:\skripsiku\flask\lib\site-packages\flask\cli.py", line 235, in locate_app import(module_name) File "E:\skripsiku\microblog.py", line 1, in from app import app ImportError: cannot import name 'app' Oh and lastly there is my folder structure. I have main folder named skripsiku then in there I have app folder (in : init.py, routes.py) and microblog.py. Can anyone help me? thank you Continue reading...