Question

I am practicing python by doing some projects, and I am stuck on this function. I'd like to know how to do it without using statements like break, input, print, or continue.

The first parameter represents a "person to friends" dictionary, the second parameter represents a "person to clubs" dictionary, and the third parameter represents a person's name in the same format as the dictionary keys). Using the recommendation system described below, the function should return the club recommendations for the given person as a list of 2-element tuples. The first element of each tuple is a potential club's name in the same format as the dictionary keys) and the second element is that potential club's score. Only potential clubs with non-zero scores should be included in the list. The recommendations should be sorted from highest to lowest score. If multiple clubs have the same score, they should be sorted alphabetically (by the clubs' names). The person given as the first argument may be a key in zero, one, or both of the given dictionaries. Recommendation score Imagine that a person wants to get recommendations for potential clubs – clubs they are not a member of but may wish to join. The social network calculates a recommendation score for each potential club. For a particular person, each potential club starts out with a score of O and is scored using the following point system: • Add 1 point to the potential club's score for each of the person's friends who are members of the potential club. • Add 1 point for every member of the potential club, who is in at least one different club with the person. Examples (refer to the diagram below, which represents the data in P2F and P2C in the starter code): recommend clubs: (Dict[str, List[str]]. Dict[str, List[str]]. str) -> List[Tuple(str, int]] When making recommendations for Jesse Katsopolis, the result is: [('Comics R Us', 2), ('Smash Club', 1)] • Comics R Us gets one point because Jesse Katsopolis's friend Joey Gladstone is a member of Comics R Us. • Comics R Us gets a second point because Joey is a member of Comics R Us and both Jesse and Joey are members of Parent Council. • Smash Club gets one point because Kimmy is a member of Smash Club and Kimmy is in a different club (Rock N Rollers) with Jesse. When making recommendations for Stephanie ) Tanner, the result is: [('Comet Club', 1), ('Rock N Rollers', 1), ('Smash Club', 1)] • Comet Club gets one point because Stephanie's friend Michelle Tanner is a member of Comet Club. • Smash Club gets one point because Stephanie's friend Kimmy Gibbler is a member of Smash Club. • Rock N Rollers gets one point because Stephanie's friend Kimmy Gibbler is a member of Rock N Rollers. Hint: There are two ways a potential club's score can increase. Consider creating a helper function for each way.

Answer 1

Hello,

Please find the solution given below, if you have any doubts in it please ask me in comment section.Thank You

Solution:

Code to Copy:

P2F = {
   'Jesse Katsopolis': ['Danny R Tanner', 'Joey Gladstone',
   'Rebecca Donaldson-Katsopolis'],
   'Rebecca Donaldson-Katsopolis': ['Kimmy Gibbler'],
   'Stephanie J Tanner': ['Michelle Tanner', 'Kimmy Gibbler'],
   'Danny R Tanner': ['Jesse Katsopolis', 'DJ Tanner-Fuller',
   'Joey Gladstone']
   }

P2C = {
   'Michelle Tanner': ['Comet Club'],
   'Danny R Tanner': ['Parent Council'],
   'Kimmy Gibbler': ['Rock N Rollers', 'Smash Club'],
   'Jesse Katsopolis': ['Parent Council', 'Rock N Rollers'],
   'Joey Gladstone': ['Comics R Us', 'Parent Council']
   }

def recommend_clubs(
                   person_to_friends: Dict[str, List[str]],
                   person_to_clubs: Dict[str, List[str]],
                   person: str,) -> List[Tuple[str, int]]:
                   """
                   Return a list of club recommendations for person based on the
                   "person to friends" dictionary person_to_friends and the "person
                   to clubs" dictionary person_to_clubs using the specified
                   recommendation system.
                   """
                   club_recommendations = {}
                  
                   if person in person_to_friends.keys():#check whether given person is in person_to_frinds dictionary
                       friends = person_to_friends[person]#get the corresponding person's friends list
                   else:
                       print("Given \"{}\" person coundn't find in P2F dictionary".format(person))
                       exit(1)
                  
                   for friend in friends:#iterate over a friends list
                       if friend in P2C.keys():
                           clubs = P2C[friend]
                           for club in clubs:
                               count = 1
                               if club not in club_recommendations:
                                   club_recommendations[club] = count# add recommended club into club_recommendations dict
                               else:
                                   club_recommendations[club] += 1#if club is aready present in dict the increment its recommendation count

                       else:
                           pass
                           #print("\"{}\" coundn't find in P2C dictionary\n".format(friend))

                   club_recommendation_list = (list(club_recommendations.items())) #convert dictionary of items to a list

                   return club_recommendation_list

if __name__ == '__main__':
       club_recommendation_list = recommend_clubs(P2F,P2C,'Stephanie J Tanner')
       print(club_recommendation_list)

Screenshot of code:

Screenshot of Output;