URGENT: need help with the following. Please finish the code if more information is needed let me know. # Loads data for both books and movies, returning a dictionary with two keys, 'books' and 'movies', one for # each subset of the collection. def load_collections(): # Load the two collections. book_collection, max_book_id = load_collection("books.csv") movie_collection, max_movie_id = load_collection("movies.csv") # Check for error. if book_collection is None or movie_collection is None: return None, None # Return the composite dictionary. return {"books": book_collection, "movies": movie_collection}, max(max_book_id, max_movie_id) # Loads a single collection and returns the data as a list. Upon error, None is returned. def load_collection(file_name): max_id = -1 try: # Create an empty collection. collection = [] # Open the file and read the field names collection_file = open(file_name, "r") field_names = collection_file.readline().rstrip().split(",") # Read the remaining lines, splitting on commas, and creating dictionaries (one for each item) for item in collection_file: field_values = item.rstrip().split(",") collection_item = {} for index in range(len(field_values)): if (field_names[index] == "Available") or (field_names[index] == "Copies") or (field_names[index] == "ID"): collection_item[field_names[index]] = int(field_values[index]) else: collection_item[field_names[index]] = field_values[index] # Add the full item to the collection. collection.append(collection_item) # Update the max ID value max_id = max(max_id, collection_item["ID"]) # Close the file now that we are done reading all of the lines. collection_file.close() # Catch IO Errors, with the File Not Found error the primary possible problem to detect. except FileNotFoundError: print("File not found when attempting to read", file_name) return None except IOError: print("Error in data file when reading", file_name) return None # Return the collection. return collection, max_id # Display the menu of commands and get user's selection. Returns a string with the user's reauexted command. # No validation is performed. def prompt_user_with_menu(): print(" ********** Welcome to the Collection Manager. **********") print("COMMAND FUNCTION") # print(" ci Check in an item") # print(" co Check out an item") # print(" ab Add a new book") # print(" am Add a new movie") # print(" db Display books") # print(" dm Display movies") # print(" qb Query for books") # print(" qm Query for movies") print(" x Exit") return input("Please enter a command to proceed: ") # This is the main program function. It runs the main loop which prompts the user and performs the requested actions. def main(): # Load the collections, and check for an error. library_collections, max_existing_id = load_collections() if library_collections is None: print("The collections could not be loaded. Exiting.") return print("The collections have loaded successfully.") # Display the error and get the operation code entered by the user. We perform this continuously until the # user enters "x" to exit the program. Calls the appropriate function that corresponds to the requested operation. operation = prompt_user_with_menu() while operation != "x": ############################################################################################################### ############################################################################################################### # HINTS HINTS HINTS!!! READ THE FOLLOWING SECTION OF COMMENTS! ############################################################################################################### ############################################################################################################### # # The commented-out code below gives you a some good hints about how to structure your code. # # FOR BASIC REQUIREMENTS: # # Notice that each operation is supported by a function. That is good design, and you should use this approach. # Moreover, you will want to define even MORE functions to help break down these top-level user operations into # even smaller chunks that are easier to code. # # FOR ADVANCED REQUIREMENTS: # # Notice the "max_existing_id" variable? When adding a new book or movie to the collection, you'll need to # assign the new item a unique ID number. This variable is included to make that easier for you to achieve. # Remember, if you assign a new ID to a new item, be sure to keep "max_existing_id" up to date! # # Have questions? Ask on Piazza! # ############################################################################################################### ############################################################################################################### # if operation == "ci": # check_in(library_collections) # elif operation == "co": # check_out(library_collections) # elif operation == "ab": # max_existing_id = add_book(library_collections["books"], max_existing_id) # elif operation == "am": # max_existing_id = add_movie(library_collections["movies"], max_existing_id) # elif operation == "db": # display_collection(library_collections["books"]) # elif operation == "dm": # display_collection(library_collections["movies"]) # elif operation == "qb": # query_collection(library_collections["books"]) # elif operation == "qm": # query_collection(library_collections["movies"]) # else: # print("Unknown command. Please try again.") operation = prompt_user_with_menu() # Kick off the execution of the program. main()