Write a program named lastname_firstname_cities. py that works with information about large cities. Your program will open the cities. txt downloadfile. Each line in the file has the name of a city, its country, and its population. The first few lines of the file look like this:

Answer and Explanation:

Open your text editor and open new file. Save new file file as lastname_firstname_cities.py. The program will open the file cities.txt downloadfile hence :

dfile= open(cities.txt, "r")

If we write this into our lastname_firstname_cities.py file it will open our cities.txt downloadfile in read mode and text mode(by default unless we specify binary mode which is for images)

well you didnt give us any options it looks like so im going to go with because cash cant be traced.

the difference is right there dont you see it