Write a program to look for lines of the form: new revision: 39772and extract the number from each of the lines using a regular expression and the findall() method. compute the average of the numbers and print out the average. there are two data files. you must ask the user for the name of the file he wishes to process. you may assume that he will always enter either mbox. txt or mbox-short. txt. that is, you don't have to do any error trapping (no try/catch).your program should look for lines that begin with the text "new revision: " followed by any number of spaces, followed by any number of digits. extract the digits (they will be extracted as a string and will be inserted into a list that has the string as the only element, e. g. ["12345"]).convert each number into an integer (they will all be integers, no floating point numbers). count the number of such lines that you encounter and sum the numbers. at the end, print out the sum, the count, and the average (sum/count). below is the output for each file. you should get the same results. enter file: mbox. txtsum: 69004133count: 1790average: 38549.79497206704enter file: mbox-short. txtsum: 1073437count: 27average: 39756.92592592593