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

0 vote388 views1 answer
Flask put request example
Python Flask
0 vote403 views2 answers
Flask lazy response style with `make_response`
Python Flask
2 votes483 views1 answer
How to return images in flask response?
Python Flask
0 vote371 views1 answer
Flask decoding base 64 image
Python Flask
1 vote395 views1 answer
How to config your flask for gmail
Python Flask
0 vote386 views1 answer
Flash not defined python flask
Python Flask
2 votes378 views1 answer
Flask for loops
Python Flask
0 vote337 views1 answer
Flask development mode
Python Flask
0 vote417 views1 answer
How to set up flash message in html template in flask app
Python Flask
0 vote381 views1 answer
Sessions in flask
Python Flask