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

45 votes142 views2 answers
String to datetime convert
Python
3 votes137 views3 answers
Python iterar claves
Python
0 vote138 views1 answer
Remove prefix from string python
Python
1 vote99 views2 answers
How to add a column in start of dataset using pandas
Python
1 vote141 views2 answers
Location of python in cmd
Python
0 vote171 views1 answer
"setFlag(QGraphicsItem.ItemIsMovable)" crash
Python
0 vote110 views1 answer
Combine picture and audio python
Python
0 vote146 views1 answer
Assert var == 0
Python
32 votes127 views4 answers
Python pip install matplotlib
Python
0 vote131 views2 answers
1007 solution python
Python