Question

Write a program that first reads in the name of an input file and then reads the input file using the file.readlines() method. The input file contains an unsorted list of number of seasons followed by the corresponding TV show. Your program should put the contents of the input file into a dictionary where the number of seasons are the keys, and a list of TV shows are the values (since multiple shows could have the same number of seasons).

Sort the dictionary by key (least to greatest) and output the results to a file named output_keys.txt, separating multiple TV shows associated with the same key with a semicolon (;). Next, sort the dictionary by values (alphabetical order), and output the results to a file named output_titles.txt.

This is my current code but it doesn't produce any output. I need help with it.

# Type your code here

def file_reader(file_name):

    tv_dict = {}

    try:

        with open(file_name,"r") as myfile:

            details = myfile.readlines()

            for item in details:

                k,v =item.strip().split(maxsplit=1)

                if int(k) in tv_dict:

                    tv_dict[int(k)].append(v)

                else:

                    tv_dict[int(k)]=[v]

    except:

        return None

    return tv_dict

    

def sorting(dict_t):

    sort1 = {}

    sort2 = {}

    for k in sorted(dict_t.keys()):

        sort1[k]=list(set(dict_t[k]))

        sort2[k]=sorted(list(set(dict_t[k])))

    out1 = ""

    out2 = ""

    for k,v in sort1.items():

        out1+=str(k)+": "+"; ".join(v)+"\n"

    for key,value in sort2.items():

        out2+=str(k)+": "+"; ".join(v)+"\n"

    return out1[:-1],out2[:-1]

def output_file(output,filename):

    with open(filename,"w") as outfile:

        outfile.write(output)

def main():

    input_file = input("Enter input file name:")

    tv_dict = file_reader(input_file)

    if tv_dict is None:

        print("Error: File Not Found: {}".format(input_file))

        return

    output_file1 ="output_keys.txt"

    output_file2 ="output_titles.txt"

    out1,out2 = sorting(tv_dict)

    output_file(out1, output_file1)

    output_file(out2, output_file2)

main()

Answer 1

def readInputFile(filename):

   shows_dict = {}                                   #create an empty dictionary

   infile = open(filename, 'r')                   #open input file

   lines = infile.readlines()                       #read all lines of the file

   for i in range(0, len(lines), 2):               #loop for all lines, with increment of 2

       numOfSeasons = int(lines[i].strip())       #get number of seasons from ith line

       show = lines[i+1].strip()                   #get show name from (i+1)th line

       if numOfSeasons not in shows_dict.keys():   #create a key for numOfSeasons if it not exists

           shows_dict[numOfSeasons] = []

       shows_dict[numOfSeasons].append(show)        #add the show to the list of values for that key

   #print(shows_dict)  

   return shows_dict                               #return the dictionary

def outputSortedbyKeys(dict, filename):

   print("Sorting by keys: ")

   outfile = open(filename,'w')                   #open output file for writing

   for key in sorted(dict.keys()):                   #sort the keys

       outfile.write('{}: {}\n'.format(key,'; '.join(dict.get(key))))   #write the key: values separated by ;

       print('{}: {}'.format(key,'; '.join(dict.get(key))))

   print(filename + " written successfully\n")

def outputSortedbyValues(dict, filename):

   titles = []

   for key in dict.keys():                           #get all the values and store in titles list

       for val in dict[key]:

           titles.append(val)

   outfile = open(filename,'w')                   #open output file for writing

   for title in sorted(titles):                   #sort the titles list and write to file

       outfile.write('{}\n'.format(title))

       print(title)

   print(filename + " written successfully\n")

def main():

   filename = input("Enter the input filename: ")       #read name of inputfile

   shows_dict = readInputFile(filename)               #read data from file and get the dictionary

   outputSortedbyKeys(shows_dict , 'output_keys.txt')   #sort and output dictionary sorted by keys

   outputSortedbyValues(shows_dict , 'output_titles.txt') #sort and output dictionary sorted by values

main()