Flask is a lightweight WSGI web application framework. It is designed to make getting started quick and easy, with the ability to scale up to complex applications. It began as a simple wrapper around Werkzeug and Jinja and has become one of the most popular Python web application frameworks.
Step #0:
Signup (I appreciate if you use my referral link)
https://www.vpsserver.com/?affcode=21edd2c7bade
after your account becomes verified, create a Ubuntu 19.04 server.
Step #1:
Install python pip and flask by run: $ sudo apt install python-pip $ sudo apt install python3-pip $ pip install -U Flask $ pip3 install -U Flask
Step #2:
Add your project files on the server (ex. from GitHub using clone command)
in this tutorial let’s use a very simple flask app example that prints Hello, World! and save the app in (ex. /var/www/flask):
$ mkdir /var/www/flask $ cd /var/www/flask $ nano app.py
copy below code and paste it in app.py file using CTRL + SHIFT + V keys.
# app.py file
from flask import Flask
app = Flask(__name__)
@app.route("/")
def hello():
return "Hello, World!"then press ( CTRL+ X )-> Y -> ENTER.
Step #3:
Run the server by run: $ env FLASK_APP=app.py flask run -h xxx.xxx.xxx
change xxx.xxx.xxx to your server ip
output:
Serving Flask app "app.py"
* Environment: production
WARNING: This is a development server. Do not use it in a production deployment.
Use a production WSGI server instead.
* Debug mode: off
* Running on http://xxx.xxx.xxx:5000/ (Press CTRL+C to quit)