Flask getting started

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 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.pocoo.org quickstart

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)

Flask run

app = Flask(__name__)

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

Flask getting started

from flask import Flask

app = Flask(__name__)

@app.route("/")
def hello_world():
    return "<p>Hello, World!</p>"

if __name__ == '__main__':
    app.run(debug=True)
    
# To run in CMD
# python app.py

Similar codes

15 votes305 views6 answers
Install flask
Python Flask
3 votes202 views2 answers
Install flask on linux mint for python3
Python Flask
0 vote178 views1 answer
Linking bootstrap in flask
Python Flask
3 votes183 views1 answer
Flask secret key generator
Python Flask
-1 vote322 views4 answers
Flask documentation
Python Flask
1 vote193 views3 answers
Python venv flask
Python Flask
0 vote197 views1 answer
Flask stream with data/context
Python Flask
2 votes390 views1 answer
Minimal flask application import
Python Flask
1 vote136 views1 answer
Procfile for flask app
Python Flask
0 vote190 views1 answer
Flask development mode
Python Flask