Assignment 1

1. Demo problem. Suppose we want to use for-loops to produce this arrow-head like pattern:

   *
   **
   ***
   ****
   *****
   ******
   *******
   ********
   *********
   **********
   **********
   *********
   ********
   *******
   ******
   *****
   ****
   ***
   **
   *
       

   At this point, do not read further and try to address the following:
   • First understand what is being asked.
   • Do you see a for-loop or two at work where, as the loops are printing, you'll get the output shown above?
   • Can the problem be broken down into parts, where you can solve the parts and put the solution together afterwards?
   • Try writing some code to get at least some of the output.

   Now examine the solution

   Don't forget to submit your solutions to the exercises within.

2. In my_numrect.py, write a program that must use nested loops to print the following pattern:

   01234
   12345
   23456
   34567
   45678
   56789
   

3. In my_hollowbox.py, write a program that must use at least one nested for loop to print the following pattern:

   ******
   *    *
   *    *
   *    *
   *    *
   ******
   

   You will turn in your program such that when run it prints the above pattern; however, you must design your program such that it has one variable at the beginning that determines the size of the box where size is the number of stars on the first line and the overall number or rows. For example, the first line of your program may read:

   size = 6
   

   Your program must generate the box based on whatever integer value is assigned to this variable. For example, setting this variable to

   size = 8

   would print the following box:

   ********
   *      *
   *      *
   *      *
   *      *
   *      *
   *      *
   ********
   

   Remember, the program you turn in must have this variable set to a value of

   size = 6

   and generate a box of size 6.

4. In this exercise you will use a drawing tool and a for-loop to draw a series of rectangles. The goal is to draw this:

   

   The code for drawing a single rectangle is:

   from drawtool import DrawTool
   
   dt = DrawTool()
   dt.set_XY_range(0,100, 0,100)
   dt.set_aspect(1)
   
   # dt.draw_filled_rectangle(lower_left_x, lower_left_y, width, height)
   dt.draw_filled_rectangle(20, 20, 10, 15)
   
   dt.display()
       

   Running that code should display the following image:

   

   As a first step, download drawtool.py into your assignment1 folder and type up the above single-rectangle example in my_filled_rectangle_example.py. This way, you know that the download worked and that drawing works.

   Note the comment describing the draw_filled_rectangle function. The function takes four arguments: the first two arguments specify the x and y coordinates of the lower left corner of the rectangle, the second two arguments specify the rectangle's width and height.

   Now, in my_rectangle_plot.py, write code to display the plot with multiple rectangles. Your solution must use a for loop to draw the multiple rectangles, so think about how you will loop over a range of values and how long that range of values needs to be.

   Write your program in my_rectangle_plot.py.

5. The following program intends to print

   "The best conversations are with yourself. At least there's no risk of a misunderstanding." - Olga Tokarczuk
   "...we have to keep reminding ourselves, over and over: "This is water, this is water."" - David Foster Wallace
   "Time solves most things. And what time can't solve, you have to solve yourself." - Haruki Murakami
     

   This is the draft program. It contains several errors...

   print("The best conversations are with yourself. At least there's no risk of a misunderstanding." - Olga Tokarczuk)
   print("...we have to keep reminding ourselves, over and over: "This is water, this is water."" - David Foster Wallace)
   print('Time solves most things. And what time can't solve, you have to solve yourself." - Haruki Murakami')
       

   Identify the errors in your assignment pdf. Fix them in quotes.py.

6. The following program intends to print "Hello!" six times as in:

   Hello!
   Hello!
   Hello!
   Hello!
   Hello!
   Hello!
       

   This is the draft program. It contains several errors...

   def print_hello_6()
       for i in range 6:
           print('Hello')
   
   print(hello_6())
       

   Identify the errors in your assignment pdf. Fix them in fixed_hello6.py.

7. This program intends to print the following:

   Stand by...
   5
   4
   3
   2
   1
   Lift off!
     

   This is the draft program. It contains several errors...

   Def countdown
       for j in range(5)
           print(i)
   
   print "Stand by..."
   count down()
   print("Lift off!')
       

   Identify the errors in your assignment pdf. Fix them in fixed_liftoff.py.

8. In each assignment, we will include a sometimes whimsical, sometimes serious non-coding exploration to encourage creativity and curiousity. For this assignment, in your assignment1.pdf, make a cartoon that makes light of "frustration with computers". You can use a simple drawing tool, or find images that are copyright-free (please include the link to images/cartoons). Make sure the caption is original (this is the whole point). We'll post some of the funniest ones.

A1.6 Audio:

How to submit:

• Write all your programs and assignment1.pdf in a directory called assignment1.
• Make a zip of the directory and submit that.