python

1. Display the following menu to the user: 1) Create a new file 2)Display the file 3)Add a new item to the file make a selection 1,2 or 3 : ask the user to enter 1,2 or 3 . if they select anything other than 1,2 or 3 it should display a suitable error message. if they select 1 , ask the user to enter a school subject and save it to a new file called "subject.txt". it should overwrite any existing file with a new file. if they select 3 , ask the user to enter a new subject and save it to the file and then display the entire content of the file. run the program several times to test the options