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diff --git a/practice/prep11.py b/practice/prep11.py
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+"""CSC110 Fall 2021 Prep 11: Programming Exercises
+
+Instructions (READ THIS FIRST!)
+===============================
+
+This Python module contains the data class definitions that serve as the foundation
+for our computational model of a food delivery system, as we discussed in this week's
+prep reading.
+
+Please read through this file carefully, and follow all instructions described below.
+We have marked each place you need to write code with the word "TODO".
+As you complete your work in this file, delete each TODO comment.
+
+
+Copyright and Usage Information
+===============================
+
+This file is provided solely for the personal and private use of students
+taking CSC110 at the University of Toronto St. George campus. All forms of
+distribution of this code, whether as given or with any changes, are
+expressly prohibited. For more information on copyright for CSC110 materials,
+please consult our Course Syllabus.
+
+This file is Copyright (c) 2021 David Liu, Mario Badr, and Tom Fairgrieve.
+"""
+from __future__ import annotations
+
+from dataclasses import dataclass
+import datetime
+from typing import Optional
+
+
+@dataclass
+class Restaurant:
+ """A place that serves food.
+
+ Attributes:
+ - name: the name of the restaurant
+ - address: the address of the restaurant
+ - menu: the menu of the restaurant with the name of the dish mapping to
+ the price
+ - location: the location of the restaurant as (latitude, longitude)
+
+ Representation Invariants:
+ - self.name != ''
+ - self.address != ''
+ - all(self.menu[item] >= 0 for item in self.menu)
+ - -90 <= self.location[0] <= 90
+ - -180 <= self.location[1] <= 180
+
+ Sample Usage:
+ >>> mcdonalds = Restaurant(name='McDonalds', address='160 Spadina Ave',\
+ menu={'fries': 4.5}, location=(43.649, -79.397))
+ """
+ name: str
+ address: str
+ menu: dict[str, float]
+ location: tuple[float, float]
+
+
+@dataclass
+class Customer:
+ """A person who orders food.
+
+ Instance Attributes:
+ - name: Customer's name
+ - location: Customer's position in (latitutde, longitude) format.
+
+ Representation Invariants:
+ - self.name != ''
+ - -90 <= self.location[0] <= 90
+ - -180 <= self.location[1] <= 180
+
+ Sample Usage:
+ >>> david = Customer('David', (44.649, -79.115))
+ """
+ name: str
+ location: tuple[float, float]
+
+
+@dataclass
+class Order:
+ """A food order from a customer.
+
+ Attributes:
+ - customer: the customer who placed this order
+ - restaurant: the restaurant the order is placed for
+ - food_items: a mapping from names of food to the quantity being ordered
+ - start_time: the time the order was placed
+ - courier: the courier assigned to this order (initially None)
+ - end_time: the time the order was completed by the courier (initially None)
+
+ Representation Invariants:
+ - self.food_items != {}
+ - all(self.food_items[item] > 0 for item in self.food_items)
+ - all(f in self.restaurant.menu for f in self.food_items)
+
+ Sample Usage:
+ >>> david = Customer('David', (44.649, -79.115))
+ >>> mcdonalds = Restaurant(name='McDonalds', address='160 Spadina Ave',\
+ menu={'fries': 4.5}, location=(43.649, -79.397))
+ >>> order = Order(customer=david, restaurant=mcdonalds,\
+ food_items={'fries': 10},\
+ start_time=datetime.datetime(2020, 11, 5, 11, 30))
+ >>> order.courier is None # Illustrating default values
+ True
+ >>> order.end_time is None
+ True
+ """
+ customer: Customer
+ restaurant: Restaurant
+ food_items: dict[str, int]
+ start_time: datetime.datetime
+ courier: Optional[Courier] = None
+ end_time: Optional[datetime.datetime] = None
+
+
+@dataclass
+class Courier:
+ """A person who delivers food orders from restaurants to customers.
+
+ Deliberately left blank (you don't need to do anything here).
+ We'll discuss this data class in lecture!
+ """
+
+
+def total_cost(order: Order) -> float:
+ """Return the total cost of the food items in this order.
+
+ Done: add one doctest example for this function that:
+ 1. Creates a valid customer and restaurant, where the restaurant
+ has at least two different foods on the menu.
+ 2. Creates an order for this customer and restaurant that orders
+ >= 2 different food items, and >= 3 quantity of each item.
+ 3. Calculates the total cost of the order.
+ (Use math.isclose to avoid rounding error with floats.)
+
+ >>> import math
+ >>> david = Customer('David', (44.649, -79.115))
+ >>> mcdonalds = Restaurant(name='McDonalds', address='160 Spadina Ave',\
+ menu={'fries': 4.5, 'strawberries': 9999, 'ice cream': 1},\
+ location=(43.649, -79.397))
+ >>> order = Order(customer=david, restaurant=mcdonalds,\
+ food_items={'fries': 10, 'strawberries': 4},\
+ start_time=datetime.datetime(2020, 11, 5, 11, 30))
+ >>> math.isclose(total_cost(order), 40041.0)
+ True
+ """
+ return sum([order.food_items[f] * order.restaurant.menu[f] for f in order.food_items])
+
+
+if __name__ == '__main__':
+ import python_ta
+ python_ta.check_all(config={
+ 'max-line-length': 100,
+ 'extra-imports': ['python_ta.contracts', 'dataclasses', 'datetime'],
+ 'disable': ['R1705', 'C0200'],
+ })
+
+ import python_ta.contracts
+ python_ta.contracts.DEBUG_CONTRACTS = False
+ python_ta.contracts.check_all_contracts()
+
+ import doctest
+ doctest.testmod()
diff --git a/scrape-addon.html b/scrape-addon.html
new file mode 100644
index 0000000..d17be26
--- /dev/null
+++ b/scrape-addon.html
@@ -0,0 +1,155 @@
+
+
+
+
diff --git a/scrape.py b/scrape.py
new file mode 100644
index 0000000..1c36bb0
--- /dev/null
+++ b/scrape.py
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+"""
+Since the final test is open-notes, I've made this script to combine all course notes into one html
+file, so I can ctrl+F without needing to find which chapter some definition is from.
+"""
+import binascii
+import os
+import re
+import secrets
+from pathlib import Path
+
+import requests
+
+
+def write(file: str, text: str) -> None:
+ """
+ Write text to a file
+
+ :param file: File path
+ :param text: Text
+ :return: None
+ """
+ if '/' in file:
+ Path(file).parent.mkdir(parents=True, exist_ok=True)
+
+ with open(file, 'w', encoding='utf-8') as f:
+ f.write(text)
+
+
+def read(file: str) -> str:
+ """
+ Read file content
+
+ :param file: File path (will be converted to lowercase)
+ :return: None
+ """
+ with open(file, 'r', encoding='utf-8') as f:
+ return f.read()
+
+
+def get(url: str) -> str:
+ req = requests.get(url)
+ req.encoding = req.apparent_encoding
+ return req.text
+
+
+if __name__ == '__main__':
+ host = 'https://www.teach.cs.toronto.edu'
+ baseurl = f'{host}/~csc110y/fall/notes/'
+ basedir = 'notes'
+
+ r = get(baseurl)
+
+ # Replace references
+ g: set[str] = set(re.findall('(?<=href=").*?(?=")', r))
+ for href in g:
+ url = href
+ filename = href.replace('~', '-')
+ if not (url.startswith('//') or url.startswith('http')):
+ if url.startswith('/'):
+ url = host + url
+ else:
+ url = baseurl + url
+ else:
+ filename = filename.split("//")[1]
+
+ if filename.endswith('/'):
+ filename += 'index.html'
+
+ r = r.replace(href, filename)
+ path = os.path.join(basedir, filename)
+ if os.path.isfile(path):
+ continue
+
+ content = get(url)
+ write(path, content)
+
+ write(os.path.join(basedir, 'index.html'), r)
+
+ # Create full file
+ r = re.sub('<[/]*(section|p).*?>', '', r)
+ r = r.replace('CSC110 Course Notes Home',
+ '{INJECT_HERE}')
+
+ links: list[str] = re.findall('.*?', r)
+ for link in links:
+ uid = secrets.token_hex(5)
+ href: str = re.findall('(?<=href=").*?(?=")', link)[0]
+ anchor = '-'.join([i[:2] for i in href.split('/')])
+ html = read(os.path.join(basedir, href))
+ html = re.sub('<(!DOCTYPE|html|/html|body|/body).*?>', '', html)
+ html = re.sub('<(head|div style="display:none"|footer)>.*?', '', html,
+ flags=re.DOTALL)
+ # Replace IDs
+ ids = set(re.findall('(?<=id=").*?(?=")', html))
+ for id in ids:
+ html = html.replace(f'"{id}"', f'"{id}-{uid}"')
+ html = html.replace(f'"#{id}"', f'"#{id}-{uid}"')
+
+ if '' not in html:
+ html += ''
+
+ # Download images
+ g: set[str] = set(re.findall('(?<=src=").*?(?=")', html))
+ for src in g:
+ if src.startswith('//') or src.startswith('http'):
+ continue
+ path = os.path.join(basedir, src)
+ # if os.path.isfile(path):
+ # continue
+
+ if src.startswith('/'):
+ url = host + src
+ else:
+ url = baseurl + f'{href.split("/")[-2]}/' + src
+
+ print(url)
+ img_data = requests.get(url).content
+ Path(path).parent.mkdir(parents=True, exist_ok=True)
+ with open(path, 'wb') as f:
+ f.write(img_data)
+
+ r = r.replace(link, f'' + html)
+ # print(link.replace(href, f'#anchor-{anchor}'))
+
+ r = r.replace('{INJECT_HERE}', read('scrape-addon.html'))
+ write(os.path.join(basedir, 'full.html'), r)
+
+
+