Docker NameError: name 'app' is not defined
The error you have shown in the image and the code does not seem matched. to reproduce your error is to pass app to flask object instead of __name__.
Here you go with HelloWorld
FROM python:alpine3.7RUN pip install flask==0.10.1COPY . /appWORKDIR /appEXPOSE 5000CMD python app.pyand app.py
from flask import Flaskapp = Flask(__name__)@app.route("/")def index(): return "Welcome to the Data Science Learner!"if __name__ == "__main__": app.run(host="0.0.0.0", port=int("5000"), debug=True)build
docker build -t flask-test .run
docker run -it --rm flask-testYou can use the same with Docker compose,
docker-compose rm -f && docker-compose up --build