Outline for April 10, 2014

1. import statement
   1. import math [hypotnoex1.py]
   2. Need the “math.” before “sqrt”
   3. from math import sqrt [hypotnoex.py]
   4. Do not need the “math.” before “sqrt”
2. Turtle graphics
   1. What turtle is; import turtle
3. Drawing a figure: a box with a hat [tbox.py]
   1. Set up the window to draw in: Screen()
   2. Create the turtle: Turtle
   3. Cursor for drawing
   4. Move cursor forward: forward, backward()
   5. Turn cursor: left(), right()
   6. Wait for the window to close: mainloop()
4. Titles, background, and such [tfancybox.py]
   1. Window
      1. Color of the window background: background()
      2. Title of the window: title
   2. Turtle, more properly called “pen”
      1. Shape of the turtle: shape()
      2. Speed of the drawing: speed()
      3. Color of the drawn line: color()
      4. Thickness of the line (pixels): pensize()
      5. Hide the turtle: hideturtle()
5. Plotting points and graphing
   1. Drawing lines: penup(), pendown()
   2. Move turtle: setpos()
   3. Write text: write()
   4. Draw a dot at the current position: dot() [tchaosdots.py]
   5. Draw a line from the current position to another: goto() [tchaosline.py]
6. Functions [hello.py]
   1. What functions are
   2. Defining them
   3. Using them
7. Quick look at using them [quad.py]
   1. Passing values to functions
   2. Returning values from functions
8. The right way to do quad.py [quad-c.py]