Create a Python program that: Allows the user to enter a person's first name and last name. The user should be able to enter as many names as they desire. Create a function that takes the first name and last name, puts them together with the last name first, followed by the first name; with the names separated by commas. Take the result from the function, and place the resulting name in a list. Once the user finishes entering names, sort the contents of the list. Write the sorted names from a list into a text file. When you create the text file, allow the user to enter a name for the file to be created. After you finish writing names to the file, close the file and end the program.

#main function start

def main():

#list to store names entered by user

name_list=[]

#variable to take input from user to keep rotating the loop and take input from user again and again

ch='y'

fname=""

lname=""

while ch=='y' or ch=='Y':#keep the loop taking input from user till user do not want to enter more

#take input from user

name=[]

fname=input("Enter first name: ")

lname=input("Enter last name: ")

name.append(fname)

name.append(lname)

#append the previously input first and last name in main list

name_list.append(name)

ch=input("Do you want to continue: (y/Y for yes)")

#main function end

#get file name from user

filename=input("Enter output file name")

#open file in write mode

file=open(filename,"w")

#keep loop add data in file till main list 'name_list' have

for i in name_list:

#Write data in file

file.write("%s, %s\r\n" % (i[0],i[1]))

#close the file

file.close()

#call main function

main()

Explanation:

input the above code and see output