Exercise

The timer() context manager

A colleague of yours is working on a web service that processes Instagram photos. Customers are complaining that the service takes too long to identify whether or not an image has a cat in it, so your colleague has come to you for help. You decide to write a context manager that they can use to time how long their functions take to run.

Instructions

100 XP

Add a decorator from the contextlib module to the timer() function that will make it act like a context manager.
Send control from the timer() function to the context block.