Step 3: main

In autompg.py implement a main function that instantiates an AutoMPGData object and then

uses the iterator protocol (e.g., for a in AutoMPGData():) to loop across the object, printing

each AutoMPG object. For example, the output should look like this:

> python3 autompg.py

AutoMPG ('chevrolet', 'chevelle malibu', 1970, 18.0)

AutoMPG ('buick', 'skylark 320', 1970,15.0)

AutoMPG ('plymouth', 'satellite', 1970, 18.0)

AutoMPG ('amc', 'rebel sst', 1970, 16.0)

AutoMPG ('ford', 'torino', 1970, 17.0)