Programming, Python, Data Science, Dataset, Big Data.
"".join(phone_numbers[-7:-4]) last_4 = "".join(phone_numbers[-4:len(phone_numbers)]) return "({}) {}-{}".format(area_code,first_3,last_4) ❺ ❶ Create a class to hold our compiled regular expression ❷ Create an initialization method to compile the regular expression ❸ Create a format method to do the