Programming, Python, Data Science, Dataset, Big Data.
= "".join(digits[-4:len(digits)]) new_numbers.append("({}) {}-{}".format(area_code,first_3,last_4)) ❹ ❶ Compile our regular expression ❷ loop through all the phone numbers ❸ Gather the numbers into variables ❹ append the numbers in the right format How do we tackle this with map? Similarly, but