Hykilpikonna
120 lines
3.5 KiB
Python
120 lines
3.5 KiB
Python
"""CSC110 Fall 2020 Prep 4: Programming Exercises
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Instructions (READ THIS FIRST!)
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===============================
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This Python module contains several function headers and descriptions.
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Your task is to complete this module by doing the following for EACH function below:
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1. Implement the function so that it does what its description claims.
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You do *not* need to add new doctests or preconditions (and in fact
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you should *not* add any preconditions!).
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We have marked each place you need to write code with the word "TODO".
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As you complete your work in this file, delete each TODO comment---this is a
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good habit to get into early!
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Copyright and Usage Information
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===============================
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This file is provided solely for the personal and private use of students
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taking CSC110 at the University of Toronto St. George campus. All forms of
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distribution of this code, whether as given or with any changes, are
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expressly prohibited. For more information on copyright for CSC110 materials,
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please consult our Course Syllabus.
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This file is Copyright (c) 2020 David Liu and Mario Badr.
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"""
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from dataclasses import dataclass
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@dataclass
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class Person:
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"""A person with some basic demographic information.
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"""
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given_name: str
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family_name: str
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age: int
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address: str
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def greet_person(person: Person) -> str:
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"""Return a greeting message for the given person.
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The message should have the form 'Hello, <given_name> <family_name>!'
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>>> david = Person('David', 'Liu', 110, '110 St. George Street')
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>>> greet_person(david)
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'Hello, David Liu!'
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"""
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return f'Hello, {person.given_name} {person.family_name}!'
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def older_name(p1: Person, p2: Person) -> str:
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"""Return the first name of the person who is older among p1 and p2.
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If p1 and p2 have the same age, return the name of p1.
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>>> david = Person('David', 'Liu', 110, '110 St. George Street')
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>>> mario = Person('Mario', 'Badr', 111, '111 St. George Street')
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>>> older_name(david, mario)
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'Mario'
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"""
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return {p1.age: p1, p2.age: p2}[max(p1.age, p2.age)].given_name
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def average_age(people: list[Person]) -> float:
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"""Return the average age of the people in people.
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Preconditions:
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- people != []
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>>> david = Person('David', 'Liu', 110, '110 St. George Street')
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>>> mario = Person('Mario', 'Badr', 111, '111 St. George Street')
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>>> example_people = [david, mario]
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>>> average_age(example_people)
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110.5
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"""
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return sum([p.age for p in people]) / len(people)
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@dataclass
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class Group:
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"""A class representing a group of people.
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Its attributes are the group name and a list of the people in the group.
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"""
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name: str
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members: list[Person]
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def member_names(group: Group) -> list[str]:
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"""Return the given names of the members of the given group.
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The names appear in the same order of the members in the group.
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>>> david = Person('David', 'Liu', 110, '110 St. George Street')
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>>> mario = Person('Mario', 'Badr', 111, '111 St. George Street')
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>>> cool_profs = Group('Cool Profs', [david, mario])
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>>> member_names(cool_profs)
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['David', 'Mario']
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"""
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return [m.given_name for m in group.members]
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if __name__ == '__main__':
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import python_ta.contracts
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python_ta.contracts.DEBUG_CONTRACTS = False
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python_ta.contracts.check_all_contracts()
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import doctest
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doctest.testmod(verbose=True)
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import python_ta
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python_ta.check_all(config={
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'extra-imports': ['python_ta.contracts', 'dataclasses'],
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'max-line-length': 100,
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'disable': ['R1705']
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})
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