11.9. Chapter Exercises

The code below is supposed to set the price to 1.5 if the weight is less than 2 and otherwise set it to 1.3. It then calculates the total be multiplying the weight by price.

Fix 3 errors with indention in the code below so that it calculates the right total for a weight of 0.5 (should be 0.75).

Then change the weight to be 3 (leave numItems as 5).

weight = 0.5 numItems = 5 if weight < 2: price = 1.50 if weight >= 2: price = 1.30 total = weight * price print(total) ===== from unittest.gui import TestCaseGui class myTests(TestCaseGui): def testOne(self): self.assertEqual(weight, 3, "Testing that weight is 3.") self.assertEqual(price, 1.3, "Testing that price is correct.") self.assertEqual(total, 3.9, "Testing the total is correct.") myTests().main()

Write code to complete the isEven function. It should return True if number is even and False if it is odd.

To check if a number is even, you can divide it by 2 and look at the remainder. (Remember that x % 2 says “divide x by 2 and get the remainder”.) If the remainder is 1, the number is odd. If the remainder is 0, it is even.

def isEven(number): # Your code here # main part of program print( isEven(3) ) print( isEven(9) ) print( isEven(11) ) print( isEven(131) ) print( isEven(12) ) print( isEven(8) ) print( isEven(126) ) ===== from unittest.gui import TestCaseGui class myTests(TestCaseGui): def testOne(self): self.assertEqual(isEven(31), False, "Testing a mystery odd number.") self.assertEqual(isEven(6), True, "Testing a mystery even number.") myTests().main()

Write code to complete the calculatePay function. It takes in a number of hours worked and an hourly pay. If the hours worked is less than 40, it should just return the hours times the hourly pay. If more than 40 hours were worked, the person should earn normal pay for 40 hours and 1.5 times the normal pay for the hours over 40. So if someone worked 50 hours, at $18 per hour they would recieve \(40 \cdot 18 + ((50 - 40) \cdot 18) \cdot 1.5\)

def calculatePay(hours, hourlyPay): # Your code here # main part of program print( calculatePay(30, 15) ) print( calculatePay(40, 12) ) print( calculatePay(50, 18) ) print( calculatePay(60, 20) ) ===== from unittest.gui import TestCaseGui class myTests(TestCaseGui): def testOne(self): self.assertEqual(calculatePay(30, 15), 450.0, "Testing calculatePay(30, 15).") self.assertEqual(calculatePay(40, 12), 480.0, "Testing calculatePay(40, 12).") self.assertEqual(calculatePay(50, 18), 990.0, "Testing calculatePay(50, 18).") self.assertEqual(calculatePay(60, 20), 1400.0, "Testing calculatePay(60, 20).") myTests().main()

The number of credits someone has determines what class level they are at a University. A Senior has taken 135 or more credits. A Junior hasn’t taken that many, but has taken at least 90 credits. A Sophomore has taken at least 45. A Freshman is anyone who has taken 45 or less.

Write code to complete the getClass function. Your code should use credits and the above logic to change classLevel to the appropriate value: either "Senior", "Junior", "Sophomore", or "Freshman".

Make sure to change the variable, not just print out the answer!

def getClass(credits): classLevel = "Unknown" # Your code here return classLevel # main part of program print( getClass(150) ) print( getClass(135) ) print( getClass(120) ) print( getClass(90) ) print( getClass(85) ) print( getClass(25) ) ===== from unittest.gui import TestCaseGui class myTests(TestCaseGui): def testOne(self): self.assertEqual(getClass(150), "Senior", "Testing getClass(150).") self.assertEqual(getClass(135), "Senior", "Testing getClass(135).") self.assertEqual(getClass(120), "Junior", "Testing getClass(120).") self.assertEqual(getClass(90), "Junior", "Testing getClass(90).") self.assertEqual(getClass(85), "Sophomore", "Testing getClass(85).") self.assertEqual(getClass(25), "Freshman", "Testing getClass(25).") myTests().main()

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