With this assignment you will demonstrate:
Please:
Perform your work in the same private GitHub repository you used for Homework 1. Submit to BrightSpace a single text file or pdf that contains the link to this repo. Submit only one submission per team. Structure the repository as follows:
.
├── README.md
├── javascript/
│ └── (existing files from previous assignments)
└── python/
├── README.md
├── .gitignore
├── tests/
│ ├── __init__.py
│ └── exercises_test.py (Given to you below)
└── exercises.py
Install all your dependencies according to your own preferences. I ask only that your solution be compatible with the tests that I have given you, so that means you’ll be using PyTest. The suggested folder structure allows you to run Python tests simply with:
$ pytest
As before, since the repo is to be private, make sure you have added me and Julian as contributors to your repo (so we can run and comment on your work). Our github names are rtoal and jgonz156.
You will be graded on your programming style, so make sure you are set up so that your editor or IDE auto-formats your code. Use plugins for your editor that include formatter and a linter. VSCode has nice extensions for Python, and SonarLint can lint almost anything. I suggest you install both.
Your homework submission will be the state of your repository on the branch master, at 23:59 in the America/Los Angeles time zone on the due date above.
Make sure your README has the names of all the students that have worked on the project.
Most of the code you are to write will be “ports” of the JavaScript functions you wrote in Homework #1 into Python, with some minor modifications. There are brief descriptions of the problems below; for specifics, though, the unit tests provide the documentation you need! Well, almost everything, because there is one additional rule: you must use Type Hints on all of your functions.
Write the following functions:
TypeError if the argument is not an int.
+ and -, and create a coefficients @property to return a tuple of coefficients:>>> q1 = Quaternion(1, -2, 5, 0) >>> q2 = Quaternion(3, 0, 5, -2) >>> (q1 + q2).coefficients (4, -2, 10, -2) >>> (q1 * q2).coefficients (-22, -16, 16, -12)
Place the following file in your test folder:
from dataclasses import FrozenInstanceError
import re
import math
import pytest
from exercises import (
change, stretched, powers, say, find_first_then_lower,
top_ten_scorers, crypto_functions, Quaternion)
def test_change():
assert change(0) == (0, 0, 0, 0)
assert change(97) == (3, 2, 0, 2)
assert change(8) == (0, 0, 1, 3)
assert change(250) == (10, 0, 0, 0)
assert change(144) == (5, 1, 1, 4)
assert change(97) == (3, 2, 0, 2)
assert change(100000000000) == (4000000000, 0, 0, 0)
with pytest.raises(TypeError) as excinfo:
# No fractional amounts allowed
change(988.25)
with pytest.raises(TypeError) as excinfo:
# Do type check before negative check
change(-988.25)
with pytest.raises(ValueError) as excinfo:
change(-50)
assert str(excinfo.value) == 'amount cannot be negative'
def test_stretched():
assert stretched('') == ''
assert stretched('H e l\t\tlo') == 'Heelllllllooooo'
assert stretched('$#') == '$##'
assert stretched(' ') == ''
assert stretched('A = πr²') == 'A==πππrrrr²²²²²'
assert stretched(" ") == ""
assert stretched(" \t\n \t") == ""
assert stretched(" Hi hi ") == "Hiihhhiiii"
assert stretched("😁😂😱") == "😁😂😂😱😱😱"
assert stretched("hello world") == "heelllllllooooowwwwwwooooooorrrrrrrrllllllllldddddddddd"
with pytest.raises(TypeError):
# Test that the argument MUST be a positional argument
stretched(s = '')
def test_powers():
p = powers(base=2, limit=10)
assert next(p) == 1
assert next(p) == 2
assert next(p) == 4
assert next(p) == 8
with pytest.raises(StopIteration):
next(p)
assert list(powers(base=2, limit=-5)) == []
assert list(powers(base=7, limit=0)) == []
assert list(powers(limit=1, base=3)) == [1]
assert list(powers(base=2, limit=63)) == [1, 2, 4, 8, 16, 32]
assert list(powers(base=2, limit=64)) == [1, 2, 4, 8, 16, 32, 64]
with pytest.raises(TypeError):
# Test that the arguments MUST be keyword arguments
powers(2, 100)
def test_say():
assert say() == ''
assert say('hi')() == 'hi'
assert say('hi')('there')() == 'hi there'
assert say('hello')('my')('name')('is')(
'Colette')() == 'hello my name is Colette'
with pytest.raises(TypeError):
# Test that the argument MUST be a positional argument
say(s = '')
def test_find_first_then_lower_case():
with pytest.raises(ValueError):
find_first_then_lower(lambda s: len(s) > 10, [])
with pytest.raises(ValueError):
find_first_then_lower(lambda s: len(s) > 5, ["hello", "world"])
assert find_first_then_lower(lambda s: s.startswith("HELL"), ["HELLO", "WORLD"]) == "hello"
assert find_first_then_lower(lambda s: "d!" in s, ["Hello", "World!!"]) == "world!!"
def test_top_ten_scorers():
assert top_ten_scorers({}) == []
assert top_ten_scorers({'T1': [['A', 3, 300]]}) == []
assert top_ten_scorers({'T1': [['A', 30, 300]]}) == ['A|10.00|T1']
input = {
'ATL': [
['Betnijah Laney', 16, 263],
['Courtney Williams', 14, 193]],
'CHI': [
['Kahleah Copper', 17, 267],
['Allie Quigley', 17, 260],
['Courtney Vandersloot', 17, 225]],
'CONN': [
['DeWanna Bonner', 16, 285],
['Alyssa Thomas', 16, 241]],
'DAL': [
['Arike Ogunbowale', 16, 352],
['Satou Sabally', 12, 153]],
'IND': [
['Kelsey Mitchell', 16, 280],
['Tiffany Mitchell', 13, 172],
['Candice Dupree', 16, 202]],
'LA': [
['Nneka Ogwumike', 14, 172],
['Chelsea Gray', 16, 224],
['Candace Parker', 16, 211]],
'LV': [
['A’ja Wilson', 15, 304],
['Dearica Hamby', 15, 188],
['Angel McCoughtry', 15, 220]],
'MIN': [
['Napheesa Collier', 16, 262],
['Crystal Dangerfield', 16, 254]],
'NY': [
['Layshia Clarendon', 15, 188]],
'PHX': [
['Diana Taurasi', 13, 236],
['Brittney Griner', 12, 212],
['Skylar Diggins-Smith', 16, 261],
['Bria Hartley', 13, 190]],
'SEA': [
['Breanna Stewart', 16, 317],
['Jewell Loyd', 16, 223]],
'WSH': [
['Emma Meesseman', 13, 158],
['Ariel Atkins', 15, 212],
['Myisha Hines-Allen', 15, 236]]}
expected = [
"Arike Ogunbowale|22.00|DAL",
"A’ja Wilson|20.27|LV",
"Breanna Stewart|19.81|SEA",
"DeWanna Bonner|17.81|CONN",
"Kelsey Mitchell|17.50|IND",
"Betnijah Laney|16.44|ATL",
"Napheesa Collier|16.38|MIN",
"Skylar Diggins-Smith|16.31|PHX",
"Crystal Dangerfield|15.88|MIN",
"Myisha Hines-Allen|15.73|WSH"
]
assert top_ten_scorers(input) == expected
def test_crypto_functions():
encode, decode = crypto_functions()
for message in (b'', b'abc', bytes('😜😍😞🦾👀', 'utf-8')):
assert(decode(encode(message))) == message
def test_quaternions():
q1 = Quaternion(1, -2, 5, 0)
q2 = Quaternion(3, 0, 5, -2)
assert (q1 + q2).coefficients == (4, -2, 10, -2)
assert (q1 * q2).coefficients == (-22, -16, 16, -12)
with pytest.raises(FrozenInstanceError):
# Test immutability
q2.a = 100