Write the following code and save it to hello-serverless.py: 

# The framework is all setup to take in a 
# user defined handler function (hello in this case)
# and pass data along with the event array
def hello(event, context):
   print event   return event['data']

Now, to deploy it, run the following code:

kubectl create ns serverless
kubeless function deploy hello --runtime python2.7 --from-file hello-serverless.py --handler hello-serverless.hello -n serverless

Let's see what we have done in the preceding code:

• Line one: This creates a new namespace for the serverless functions.
• Line two: This deploys a serverless function named hello by using the hello-serverless.py file, with runtime specified as python 2.7 and the handler as the hello function in the serverless namespace.

You can check whether the function is ready by running the following command:

kubeless function ls hello  -n serverless

Now, let's call it by running the following command:

kubeless function call hello --data 'Hello world!' -n serverless

You should get the following output:

Hello world!

You have successfully run your first serverless function.