Your First Bottle Website

Writing the Code

Below is the code we will write:

from bottle import route, run

@route('/')
def hello():
    return "Hello World!"

run(port=8080)
    

Running the Code

Run the code as you would run any other Python program. Once you run it, when you go to localhost:8080, you should see Hello World! displayed on the webpage.

Code Breakdown

Now, let's break down the code we just wrote.

On the first line, we have

from bottle import route, run

After, we have

@route('/')
def hello():
    return "Hello World!"
    

Notice how this starts with

@route('/')
    

This is called a decorator function, meaning that it modifies the hello function. In this case, it makes the hello function a route for our page. For the route function, we need to pass in a route for Bottle to use. The / is the home page for our server.

After that, we define a function called hello. When we call this function, it returns the text Hello World!. When we visit the home page of our site, we will se the text Hello World!. Bottle will run this function and display whatever text it returns. We can also put HTML code in the returned string. For example, try putting <h1>Hello!</h1>. By running this code, we see Hello! displayed on the webpage as a heading (larger than regular text). We can also put HTML in templates, as we will learn in another tutorial.

Finally, we have

run(port=8080)