Python program. files

The Program Spec Write a program that enforces the following expectations of a data set file: The file must exist The data in the file must have the following format: 1. The file must start with an integer, n 2. The file must contain n data values The program prompts the user for the name of a file. The file is expected to contain data values. The first line of the file should contain the total number of values, and the remaining lines contain the data Three key potential errors to program for include: The file might not begin with an integer There might not be a sufficient number of data values There may be additional input after reading all data values For a valid data file, the processing data task is to compute the sum of all the data values in the file. Print out a result message and resultant sum for a valid data file