Write a program called test3.py that reads the provided file and reports the following information about Elon Musk's tweets:
The total number of tweets
The tweet that contains the most words (don't use cleaned up for preprocessing here)
Finally, a username is a word that starts with an @ symbol (for example, @MarkTwain). For simplicity, we will assume that any word that contains @ at any position is a username (that is, consider Mark@Twain or @Mark@Twain@ to be valid usernames). Your program should compile the information on how many times different usernames are mentioned in Elon Musk's tweets, then provide an interface that allows a user to quickly look up how many times any particular username is mentioned.