8.4

Amend the function number_of_lines() so that it reads the contents of the file stored at counts the number of lines in the file. It should then return this number. Copy and paste the following into main.py to get started. def number_of_lines(filename): "" " Write your code here ""\|" pass def main(): print(number_of_lines( "example.txt")) \# prints 3 as example.txt contains 3 lines print(number_of_lines( "test.txt")) \# prints 25 as test.txt contains 25 lines if _name__== "_main_-": main()