HOMEWORK 07: INTRO TO DICTIONARIES Solution

The goal of this homework is for you to showcase your knowledge about how to properly use dictionaries. For this assignment you will need to implement 5 functions. Refer to the rubric to see how points will be rewarded for each function. You have been given HW7.py to fill out with instructions in the docstrings. However, below you will find more detailed information to complete your assignment. Read it thoroughly before you begin.  

Function name: scheduler

Parameters : a dictionary containing members’ names as keys, and lists of months that member is available as values

Returns: the best month to schedule the meet-up (str)

Description: You’re the event manager of the National Association of Python Coders, and you want to coordinate a big meet-up for your organization. Write a function called scheduler that takes in a dictionary with members’ names as keys and lists of months during which the member is available to attend a meet-up, and returns whichever month has the most club members available. If there is more than one month with the highest number of available club members, return the month that occurs earlier in the year. NOTE: The list of months for each club member will contain integers 1-12; you should return the corresponding month name as a string (“January”, “February”, “March”, etc.) Hint: It may be useful to use a dictionary for this step.


Test cases:

    • info_dict_1 = {"Andrew Andrews": [1,4,7,8], "Brock Brockson": [1,6,8,12], "Charles Charleston": [1,2,3], "David Davidson": [1,5,9,10], "Ellen Ellenson": [1]}
    • scheduler(info_dict_1)
‘January’

    • info_dict_2 = {"Flora Flores": [4,5,6,3], "George Georges": [4,5,6,3], "Henry Henries": [4,5,6,3], "Isabella Isbell": [4,5,6,3], "John Johnson": [4,5,6,3]}

    • scheduler(info_dict_2)
‘March’


Function name: buy_albums

Parameters: a dictionary named album_buy_dict {key is the name of an album (string): value is a the album’s artist (string)}, a dictionary named artist_price_dict {key is name of an artist (string): value is the price per album of all that artist’s albums (float)}

Returns: a dictionary {key is the name of an artist (string): value is how much was paid in total for all of the albums we bought that were theirs (float)}

Description : Write a function that takes in a dictionary in which every key is the name of an album, and every is a string of the name of the album’s artist, as well as a dictionary in which every key is an artist’s name, and every value is a float of the price per album for that artist for all their albums. The function should return a dictionary in which every key is the name of an artist whose album(s) you bought, and the value is the total amount you paid for the album(s) of that particular artist (i.e. price per that artist’s albums * total number of albums bought). The dictionary should also have a key-value pair where the key is “total” and the value is the grand total for all of the albums you bought.
 
Notes:

    • You can assume spelling and punctuation of the artist names in album_buy_dict and artist_price_dict will be the same for the same artist.

    • Each album included in album_buy_dict means we bought one of that album.

    • You can assume that “total” will never be a key in the original dictionary.

    • If you print out your returned dictionary the order of the artists may be different from ours, what’s important is that each artist (key) is correctly matched to their price totals (value).


Test cases:

    • total_buy_dict = buy_albums({"Coloring Book" : “Chance the Rapper”, "Acid Rap" : “Chance the Rapper”, "The College Dropout" : “Kanye West”, “Yeezus” : “Kanye West”, “My Beautiful Dark Twisted Fantasy” : “Kanye West”, “Channel Orange” : “Frank Ocean”, "Blonde" : “Frank Ocean”, "Kauai" : “Childish Gambino”, “Continuum” : “John Mayer”}, {“Chance the Rapper” : 0.00, “Kanye West” : 9.75, “Frank Ocean” : 12.15, “Childish Gambino” : 8.45, “John Mayer” : 4.75})

    • print(total_buy_dict)

    • {'Chance the Rapper': 0.00, 'Kanye West': 29.25, 'Frank Ocean': 24.30, 'Childish Gambino': 8.45, 'John Mayer': 4.75 'total': 66.75}


Function name: translator

Parameters: a filename (str), a string

Returns: a string

Description: Write a function that takes in a filename and a string, then uses the file to create a dictionary with English words as the keys and the corresponding words in another language as the values. In the string passed in, replace every word that is a key in the dictionary with the value that the key maps to and return that new string. NOTE: You can assume the file passed in will always be in the format specified in the test cases below, and that the string will be all lowercase.

Test cases:

french_dictionary.txt


hello, bonjour

my, mon
name, nom

is, est

    • translator(“french_dictionary.txt”, “hello, my name is christine! my favorite food is pizza.”)

'bonjour, mon nom est chresttine! mon favorite food est pizza'




Authors: Christine Feng and Rodrigo Mejia
CS1301 - HOMEWORK 07: INTRO TO DICTIONARIES

4



german_dictionary.txt


i, ich

read, lebe
many, viele

books, Bucher

study, studiere
math, Mathematik

and, und

    • translator(“german_dictionary.txt”, “i read many books. i study math and computer science.”)

'ich lebe viele Bucher. ich studiere Mathematik und computer scichence.'


Function name: average_rating

Parameters: a dictionary named movies_dict {keys are the names of movies (string): values are a list of integer ratings from zero to ten (list of ints)}
Returns: a dictionary {keys are names of movies (string): values are that show’s average rating (float)}

Description: Write a function that takes in a dictionary and returns a dictionary. The function will take in a dictionary, movies_dict, where the key will be a string that represents the name of some movie and the value will be a list of integers representing ratings on a ten-point scale for that movie. The function should take this dictionary and make a new dictionary where the keys will be strings of the movie name and the values will be the average rating for that movie (rounded to 2 decimal points).

Notes:

        ◦ Remember to round the average rating of each movie to two decimal points!

        ◦ Every movie included in movies_dict will have at least one rating.

        ◦ Every rating is out of ten.

        ◦ If you print out your returned dictionary the order of the artists may be different from ours, what’s important is that each artist (key) is correctly matched to their price totals (value).

    • movies_dict = {“Back to the Future” : [8, 7, 9, 10], “Independence Day” : [8, 7, 5, 10, 10], “Men in Black” : [7, 6, 9], “Rush Hour” : [8, 9, 10, 10]}

    • test1 = average_rating(movies_dict)

    • print(test1)
{'Back to the Future': 8.5, 'Independence Day': 8.0, 'Men in Black': 7.33,

'Rush Hour': 9.25}









Authors: Christine Feng and Rodrigo Mejia
CS1301 - HOMEWORK 07: INTRO TO DICTIONARIES

5



Function name: sentence_stats

Parameters: a string

Returns: a dictionary

Description: Make a function called sentence_stats that takes in a sentence (str) as a parameter and returns a dictionary containing the information detailed in the following table:

key
value; value type
uppercase
number of uppercase letters in

the string; int
lowercase
number of lowercase letters in

the string; int
vowels
number of uppercase and lowercase

vowels (A, E, I, O, U) in the

string; int
consonants
number of uppercase and lowercase

consonants (including Y) in the

string; int
numbers
number of numbers (0123456789) in

the string; int
special_chars
number of special characters

(i.e. non-letters and non-

numbers, not including spaces) in

the string; int
word_count
number of words in the string;

int
most_common
most common character in the

string other than the space

character; str


Test cases:

>>> sentence_stats("Hello! My name is Christine 07/08")
{'uppercase': 3, 'lowercase': 19, 'vowels': 8, 'consonants': 14, 'numbers':
4, 'special_chars': 2, 'word_count': 6, 'most_common': 'e'}

>>> sentence_stats("!!!#$@%^^&$%^%^$@!%$#%$%&@%$#@%$@")

{'uppercase': 0, 'lowercase': 0, 'vowels': 0, 'consonants': 0, 'numbers': 0,

'special_chars': 33, 'word_count': 1, 'most_common': '%'}










Authors: Christine Feng and Rodrigo Mejia
CS1301 - HOMEWORK 07: INTRO TO DICTIONARIES

6



Grading Rubric

- scheduler:
20
points
-
buy_albums:
20
points
-
translator:
20
points
    • average_rating:20 points
    • sentence_stats:20 points

___________________________________________________
- Total    100/100 points

Provided

The following file(s) have been provided to you. There are several, but you will only edit one of them:

1. HW7.py

This is the file you will edit and implement. All instructions for what the methods should do are in the docstrings.

2. HW7_test.py

We have provided you with a python file called HW7_test.py. In this file we have created a series of tests for your usage. We understand you probably have never been exposed to testing code so you are not expected to do anything to this file or even use this file if you don’t want to. However, we encourage you to use it as it will be highly beneficial in testing your code. Feel free to add your own tests to the file to cover any additional cases you would like to test.

If you do desire to test your code, all you have to do is have the HW7.py and the HW7_test.py files in the same directory. Open and run HW7_test.py. After running the test, you should see the results. Check the results and start debugging if needed. If you pass all the tests you should see something like this as your output:

Disclaimer: The tests found in HW7_test.py are not intended to be an exhaustive list of all test cases and does not guarantee any type of grade. Write your own tests if you wish to ensure you cover all edge cases.

Read more about unittest here: [ https://docs.python.org/3/library/unittest.html ]


Deliverables

You must submit all of the following file(s). Please make sure the filename matches the filename(s) below. Be sure you receive the confirmation email from T-Square, and then download your uploaded files to a new folder and run them.

1.  HW7.py

If this file does not run (if it encounters an error while trying to run), you will get no credit on the assignment.

Authors: Christine Feng and Rodrigo Mejia