List Function

import time

def practice_12():
a = list(input("Enter a list of numbers separated by commas over here: "))
time.sleep(1)
print("The program will print the first and last numbers of your list.")
time.sleep(1)
print(a[::len(a)-1])

practice_12()

you can also make another simpler solution from this code without the time.sleep and the text and use only the main part which is the print(a[::len(a)-1]) or return(a[::len(a)-1]) part