Question

In this part, you will use a file containing various beasts that were featured in different titles in the Harry Potter series of books and movies. We give you a simple data file called titles.txt to test your program. Each line of the file contains a title (movie or book), followed by all the beasts featured in this title. For example, the following line: Harry Potter and the Goblet of Fire|Hippocampus|Merpeople|Niffler mentions that the title Harry Potter and the Goblet of Fire featured three beasts: Hippocampus, Merpeople, and Niffler. You can assume that the data is valid and that splitting on the '|' string will correctly parse the lines in titles.txt. Your program must do the following: Read the name of a title from the user. The user will enter any part of the title (in any case, upper or lower). Find the first title in the list that contains the input string. For example, the user may enter FIRE, which will match the above line. If no match is found, print the message. If a match is found, then do the following:

– Print all the beasts that were featured in this title in lexicographical order.

– Print all the other titles that have at least one beast in common with this title in lexicographical order.

– Print all the beasts that were featured only in this title (i.e., no other title has these beasts), again in lexicographical order. Consider which set operation will help with the last two operations . . .

Once you have finished processing the input (match or no match), ask for another input, until the user inputs stop.

How to write this problem in python?

Answer 1

Please find below code in python3.

 def main(): file1 = open('myfile.txt', 'r') Lines = file1.readlines() map1 = {} for l in Lines: spl = l.split('|') map1[spl[0]]=set(spl[1:]) title = input("Enter name of title: ") res = [val for key, val in map1.items() if title.lower() in key.lower()] set1 = res[0] print("All the beasts that were featured in this title in lexicographical order.") print(sorted(set1)) print("\nAll the other titles that have at least one beast in common with this title in lexicographical order.") res2 = [key for key, val in map1.items() if len(val.intersection(set1))>0] print(sorted(res2)) print("\nAll the beasts that were featured only in this title.") allbeast = set([a for key, val in map1.items() for a in val ]) otherbeasts = allbeast.difference(set1) print(set1.difference(otherbeasts)) main()