[PYTHON] Flask Hello World cannot be displayed on VPS

Background

I tried to build a Flask environment with VPS instead of a local environment and run Hello World, but I couldn't.

Solution

I was able to connect by specifying host in ʻapp.run`. http://example.com:8000

hello.py

import flask

app = flask.Flask(__name__)

@app.route('/')
def index():
    return "Hello, World!"

if __name__ == '__main__':
    app.run(host='0.0.0.0',port=8000)

python

$ python hello.py
 * Running on http://0.0.0.0:8000/ (Press CTRL+C to quit)

Cause

It wasn't a problem with the local environment. I should have noticed it when I ran it and displayed http://127.0.0.1 on the terminal, but it was a story I didn't notice.

If you want to access from a server other than the one you have started, specify it with host =.