flask app example

1$ export FLASK_APP=hello.py
2$ python -m flask run
3 * Running on http://127.0.0.1:5000/
4

1# Extremely simple flask application, will display 'Hello World!' on the screen when you run it
2# Access it by running it, then going to whatever port its running on (It'll say which port it's running on).
3from flask import Flask
4app = Flask(__name__)
5
6@app.route('/')
7def hello_world():
8    return 'Hello, World!'
9
10if __name__ == '__main__':
11    app.run()

1from flask import Flask
2app = Flask(__name__)
3
4@app.route('/')
5def hello_world():
6    return 'Hello, World!'
7

1#Import Flask, if not then install and import.
2
3import os
4try:
5  from flask import *
6except:
7  os.system("pip3 install flask")
8  from flask import *
9
10app = Flask(__name__)
11
12@app.route("/")
13def index():
14  return "<h1>Hello World</h1>"
15
16if __name__ == "__main__":
17  app.run(host="0.0.0.0", port=8080, debug=False)