Create a python function, encrypt()that prompts the user for an a file name (e.g., message.txt) and read the textual content of the file and substitute the alphabetic characters in the message with the next character in the English alphabet, i.e., a becomes b, m becomes n. If there are z letters, substitute those with a. Leave non-alphabetic characters as is in the encrypted message. Then the function should print the encrypted message. Disregard the case of characters. Use exception handling to handle the errors resulting in if the user inputs a wrong file name. Use the sample.txt provided to test your program.

Example output:

>>> encrypt()

Enter file name: sample.txt

uijt jt b tbnqmf ufyu gjmf. uijt gjmf dpoubjot b tbnqmf ufyu cvu op tbnqmf ps ufyu. ufyu jt jo uijt gjmf.

>>>

file contents sample.txt

This is a sample text file. This file contains a sample text but no sample or text. Text is in this file.