Python Flask Web App: Build Your First Blog in 5 Simple Steps

Working of Web Apps

Source Code

Python Flask First App

from flask import Flask

# create the flask app
app = Flask(__name__)

# home page
@app.route("/")
@app.route("/home")
def home():
	return "
Welcome to the Home Page!
"


# about page
@app.route("/about")
def about():
	return "
Welcome to the About Page!
"


# example of path parameter
@app.route("/welcome/")
def welcome(name):
	return f"
Hi {name.title()}, you're welcome to this Page!
"


# example of integer path parameter
@app.route("/addition/")
def addition(num):
	return f"
Input is {num}, Output is {num + 10}
"


# example of two integer path parameters
@app.route("/addition_two//")
def addition_two(num1, num2):
	return f"
{num1} + {num2} is {num1 + num2}
"


# start the app
if __name__ == "__main__":
	app.run(debug=True)