Flask app example

# 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 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

Flask example

from flask import Flask
app = Flask(__name__)

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

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)

Python flask sample application

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 vote316 views1 answer
Flask render error template
Python Flask
0 vote243 views1 answer
Flask where to put db.create_all
Python Flask
0 vote245 views1 answer
Flask multuple parameters
Python Flask
-1 vote410 views4 answers
Flask documentation
Python Flask
14 votes480 views6 answers
What is flask
Python Flask
26 votes368 views6 answers
Flask run
Python Flask
0 vote261 views2 answers
Where should favicon.ico be placed in flask app
Python Flask
1 vote241 views1 answer
Serving static audio files with flask in react
Python Flask
4 votes227 views2 answers
Flask arguments in url
Python Flask
4 votes240 views3 answers
How to change port in flask app
Python Flask