flask is library or framework code example
Example: python flask
from flask import Flask
app = Flask(__name__)
@app.route('/')
def index():
return "Hello world!" #if you want to render a .html file,
# import render_template from flask and use
#render_template("index.html") here.
if __name__ == '__main__':
app.debug = True
app.run() #go to http://localhost:5000/ to view the page.