Basic flask app python

Simple flask app

# Extremely simple flask application, will display 'Hello World!' on the screen when you run it
# Access it by running it, then going to whatever port its running on (It'll say which port it's running on).
from flask import Flask
app = Flask(__name__)

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

if __name__ == '__main__':
    app.run()

Source: flask.palletsprojects.com

Flask tutorial

from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
   return 'Hello World’

if __name__ == '__main__':
   app.run()

Source: tutorialspoint.com

Flask how to run app

$ export FLASK_APP=hello.py
$ python -m flask run
 * Running on http://127.0.0.1:5000/

Source: flask.palletsprojects.com

Basic flask app python

#Import Flask, if not then install and import.

import os
try:
  from flask import *
except:
  os.system("pip3 install flask")
  from flask import *

app = Flask(__name__)

@app.route("/")
def index():
  return "<h1>Hello World</h1>"

if __name__ == "__main__":
  app.run(host="0.0.0.0", port=8080, debug=False)

Similar codes

-1 vote218 views1 answer
Fro flask import Flask, request, render_template, url_for, redirect, session
Python Flask
0 vote239 views1 answer
Python update flask
Python Flask
0 vote256 views1 answer
Setting flask app environment variable
Python Flask
0 vote244 views2 answers
Flask socket io
Python Flask
0 vote279 views1 answer
Flask debugtoolbar
Python Flask
1 vote230 views2 answers
Flask bootstrap
Python Flask
0 vote290 views1 answer
Flask request post with json
Python Flask
0 vote273 views1 answer
Flask gunicorn get ip
Python Flask
0 vote255 views1 answer
Flask put request example
Python Flask
6 votes250 views3 answers
Flask client ip
Python Flask