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 vote214 views1 answer
Flask migrate multiple heads
Python Flask
0 vote211 views1 answer
Flask_uploads.exceptions.UploadNotAllowed
Python Flask
0 vote184 views10 answers
Sqlite3 with flask web application CRUD pdf
Python Flask
0 vote197 views1 answer
Use mark down with flask
Python Flask
0 vote213 views1 answer
Flask recive list
Python Flask
0 vote216 views1 answer
Simplest flask memcached
Python Flask
1 vote192 views3 answers
Python venv flask
Python Flask
0 vote212 views1 answer
Python flask models user
Python Flask
1 vote207 views1 answer
Posted data to flask
Python Flask
2 votes208 views2 answers
'flask' is not recognized as an internal or external command, operable program or batch file.
Python Flask