Before you keep reading...

Runestone Academy can only continue if we get support from individuals like you. As a student you are well aware of the high cost of textbooks. Our mission is to provide great books to you for free, but we ask that you consider a $10 donation, more if you can or less if $10 is a burden.

Support Runestone Academy Today

Before you keep reading...

Making great stuff takes time and $$. If you appreciate the book you are reading now and want to keep quality materials free for other students please consider a donation to Runestone Academy. We ask that you consider a $10 donation, but if you can give more thats great, if $10 is too much for your budget we would be happy with whatever you can afford as a show of support.

Support Runestone Academy Today

14.7. Exercises

1. 1. Using a while loop, create a list numbers that contains the numbers 0 through 35. Your while loop should initialize a counter variable to 0. On each iteration, the loop should append the current value of the counter to the list and the counter should increase by 1. The while loop should stop when the counter is greater than 35.

   ===== from unittest.gui import TestCaseGui class myTests(TestCaseGui): def testOne(self): self.assertEqual(numbers, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35], "Testing that numbers is assigned to correct values") myTests().main()

   Show Comments

2. Using a while loop, create a list called L that contains the numbers 0 to 10. (i.e.: Your while loop should initialize a counter variable to 0. On each iteration, the loop should append the current value of the counter variable to L and then increase the counter by 1. The while loop should stop once the counter variable is greater than 10.)

   ===== from unittest.gui import TestCaseGui class myTests(TestCaseGui): def testOne(self): self.assertEqual(L, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10], "Testing that L was created correctly.") myTests().main()

3. Using a while loop, create a list called nums that contains the numbers 0 though 20. (i.e: your while looop should initialize a counter variable on 0. During each iteration, the loop should append the current value of the counter variable to nums and then increase the counter by 1. The while loop should stop once the counter variable is greater than 20)

   ==== from unittest.gui import TestCaseGui class myTests(TestCaseGui): def testOne(self): self.assertEqual(nums, [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20],"Testing that nums has been assigned the correct elements") myTests().main()

4. Modify the walking turtle program so that rather than a 90 degree left or right turn the angle of the turn is determined randomly at each step.

5. Modify the turtle walk program so that you have two turtles each with a random starting location. Keep the turtles moving until one of them leaves the screen.

   import random import turtle def moveRandom(wn, t): coin = random.randrange(0,2) if coin == 0: t.left(90) else: t.right(90) t.forward(50) def areColliding(t1, t2): if t1.distance(t2) < 2: return True else: return False def isInScreen(w, t): leftBound = - w.window_width() / 2 rightBound = w.window_width() / 2 topBound = w.window_height() / 2 bottomBound = -w.window_height() / 2 turtleX = t.xcor() turtleY = t.ycor() stillIn = True if turtleX > rightBound or turtleX < leftBound: stillIn = False if turtleY > topBound or turtleY < bottomBound: stillIn = False return stillIn t1 = turtle.Turtle() t2 = turtle.Turtle() wn = turtle.Screen() t1.shape('turtle') t2.shape('circle') leftBound = -wn.window_width() / 2 rightBound = wn.window_width() / 2 topBound = wn.window_height() / 2 bottomBound = -wn.window_height() / 2 t1.up() t1.goto(random.randrange(leftBound, rightBound), random.randrange(bottomBound, topBound)) t1.setheading(random.randrange(0, 360)) t1.down() t2.up() t2.goto(random.randrange(leftBound, rightBound), random.randrange(bottomBound, topBound)) t2.setheading(random.randrange(0, 360)) t2.down() while isInScreen(wn, t1) and isInScreen(wn, t2): moveRandom(wn, t1) moveRandom(wn, t2) wn.exitonclick()

   Show Comments

6. Create a while loop that initializes a counter at 0 and will run until the counter reaches 50. If the value of the counter is divisible by 10, append the value to the list, tens.

   ===== from unittest.gui import TestCaseGui class myTests(TestCaseGui): def testTwo(self): self.assertEqual(tens, [0, 10, 20, 30, 40, 50], "Testing that tens is assigned to correct values.") myTests().main()

7. Use a while loop to iterate through the numbers 0 through 35. If a number is divisible by 3, it should be appended to a list called three_nums.

   ===== from unittest.gui import TestCaseGui class myTests(TestCaseGui): def testOne(self): self.assertEqual(three_nums, [0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33], "Testing that three_nums was created correctly.") myTests().main()

14.7.1. Contributed Exercises

You have attempted of activities on this page