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Workshop 4 - Homework

Topics

  • Defining functions with def
  • Parameters and arguments
  • Return values (return vs print())
  • Default parameter values
  • Keyword arguments
  • Returning multiple values (tuples)
  • Variable scope (local vs global)
  • Combining functions with lists and loops

Tasks

Task 1: Greeting Function

Write a function called greet(name, greeting="Hello") that returns a greeting string.

  • greet("Alice") should return "Hello, Alice!"
  • greet("Bob", "Good morning") should return "Good morning, Bob!"
  • Call the function 3 times with different arguments and print the results.

Task 2: Math Functions

Write three functions:

  • circle_area(radius) - returns the area of a circle (use 3.14159 for pi)
  • circle_circumference(radius) - returns the circumference
  • circle_info(radius) - calls both functions above and returns area AND circumference

Call circle_info() with radius 5 and print both values.

Task 3: List Statistics

Write a function called list_stats(numbers) that takes a list of numbers and returns:

  • The sum
  • The average
  • The smallest number
  • The largest number

Test it with: [10, 25, 3, 47, 18, 32, 6]

Task 4: Word Counter

Write a function called count_words(sentence) that takes a sentence string and returns:

  • The number of words
  • The number of characters (excluding spaces)
  • The longest word

Test it with: "the quick brown fox jumps over the lazy dog"

Task 5: Grade Calculator

Write a function letter_grade(score) that converts a numeric score to a letter grade:

  • 90-100: "A"
  • 80-89: "B"
  • 70-79: "C"
  • 60-69: "D"
  • Below 60: "F"

Then write class_report(grades) that takes a list of numeric scores, uses letter_grade() for each, and prints a report:

Score: 85 -> Grade: B
Score: 92 -> Grade: A
...
Class average: 77.7

Test with: [92, 85, 67, 74, 55, 91, 80]

Task 6: Password Generator

Write a function generate_password(length=12, use_digits=True, use_uppercase=True) that:

  1. Starts with lowercase letters: "abcdefghijklmnopqrstuvwxyz"
  2. Adds uppercase letters if use_uppercase is True
  3. Adds digits if use_digits is True
  4. Uses a loop to pick length random characters

(Hint: import random and use random.choice())

Test with different settings:

  • generate_password()
  • generate_password(8)
  • generate_password(16, use_digits=False)

How to Submit

  1. Complete all tasks in homework.py
  2. Push your work to your GitHub repository
  3. Share the repository link with the instructor

How to Run

python homework.py