Skip to content

homework_7.md

Latest commit

 

History

History
28 lines (22 loc) · 2.48 KB

homework_7.md

File metadata and controls

28 lines (22 loc) · 2.48 KB

Homework 7

Workshop 7 focuses on three themes: working with imports, designing flexible function signatures, and building introductory classes. Keep your solutions in a single file (for example, homework_7.py) so you can run them end to end.

Task 1: Import Playbook

  • Create a module-level constant PI_TWO_DECIMALS using math.pi rounded to two decimal places.
  • Import datetime as dt and write a current_utc() helper that returns the current UTC timestamp using dt.datetime.now(dt.timezone.utc).
  • From random, import randint as roll and implement a roll_die(sides=6) function that returns a random integer between 1 and sides.
  • Print a short summary showing the constant, current time, and the result of two dice rolls.

Task 2: Flexible Arguments

  • Write announce(event, *audiences, prefix="[INFO]") that formats a message similar to the example in workshop_7/arguments_examples.py.
  • Implement average_score(*scores) that raises a ValueError when called without scores, otherwise returns the mean rounded to one decimal place.
  • Create build_connection(host, *, port=5432, **credentials) that merges the required host, keyword-only port, and any extra credentials into a dictionary.
  • Demonstrate each function with at least two sample calls covering different argument combinations.

Task 3: Keyword-Only Practice

  • Define enroll_student(name, /, *, course, level="beginner", **meta).
  • Call the function three times showing how positional-only, keyword-only, and extra metadata arguments behave. Print the returned dictionaries so the structure is clear.
  • Add one comment explaining why the positional-only marker (/) is useful in this context.

Task 4: Intro to Classes

  • Create a Course class that stores title, capacity, and a list of students. Add an enroll(student) method that raises ValueError if the course is full and a roster() method that returns the names joined by commas or "No students yet" when empty.
  • Subclass it into OnlineCourse that adds a platform attribute and an info() method returning a string like "Python Foundations on Zoom (2/25 students)".
  • Instantiate both classes, enroll a handful of students, and print repr(course), the roster, and the info message to verify everything works.

Optional Stretch

  • Combine the pieces by writing course_report(*courses, **filters) that uses the earlier helpers (such as announce) to format a summary. Keep it simple: filtering by platform or minimum capacity is enough.