This is a Pandas solution to a data wrangling task.
- Using Pandas library read the files: "users.csv", "restaurants.csv" and "ratings.csv".
- For each restaurant in the state of San Luis Potosi calculate average rating and user count by the users aged from 30 to 40 years. Sort results in the descending order and save it to a file "rez.csv".
- "excepted_output.csv" is provided for you as the expected output.