Lab 1b — Functions

Exercise 1

5 minutes

Inside of lab1b, create a file called exercise1.py. Copy and paste the following code into this file.

from byubit import Bit


def draw_one_dot(bit):
    bit.move()
    bit.turn_left()
    bit.move()
    bit.paint('blue')
    bit.turn_right()
    bit.turn_right()
    bit.move()
    bit.turn_left()
    bit.move()


@Bit.empty_world(9, 3)
def dots(bit):
    draw_one_dot(bit)


if __name__ == '__main__':
    dots(Bit.new_bit)

Run this code, and you should see that it draws a single dot in the middle row:

Modify the dots() function so that it draws a total of four dots, each one separated by a blank square:

Exercise 2

5 minutes

Inside of lab1b, create a file called exercise2.py. Copy and paste the following code into this file.

from byubit import Bit


def draw_one_dot(bit):
    bit.turn_left()
    bit.move()
    bit.paint('blue')
    bit.turn_right()
    bit.turn_right()
    bit.move()
    bit.turn_left()


@Bit.empty_world(8, 3)
def dots(bit):
    draw_one_dot(bit)


if __name__ == '__main__':
    dots(Bit.new_bit)

Run this code, and you should see that it draws a single dot in the middle row:

Modify the dots() function so that it draws a total of four dots, each one separated by a blank square:

You should notice that your dots() function requires some glue code. This is code written in between the function calls:

@Bit.empty_world(8, 3)
def dots(bit):
    draw_one_dot(bit)
    # glue code here
    draw_one_dot(bit)

Exercise 3

15 minutes

Inside of lab1b, create a file called exercise3.py. Copy and paste the following code into this file.

from byubit import Bit


@Bit.empty_world(5, 8)
def one_firework(bit):
    pass

if __name__ == '__main__':
    one_firework(Bit.new_bit)

When you see the keyword pass this is a Python command that does nothing. It is just a placeholder. Delete pass and write code in the one_firework() function.

Bit is in a 5x8 world and you want to draw one firework:

You should also get Bit to be in the right position and direction after you draw the firework. Doing this will be good practice for the homework and project, where this will be enforced by the grader.

Exercise 4

10 minutes

Inside of lab1b, create a file called exercise4.py. Copy and paste the following code into this file.

from byubit import Bit


@Bit.empty_world(17, 8)
def fireworks(bit):
    pass


if __name__ == '__main__':
    fireworks(Bit.new_bit)

Bit is now in a 17x8 world. Copy and paste your one_firework() function into this file, above the fireworks() function. Be sure to remove the @Bit.empty_world(5, 8) decorator from the one_firework() function when you copy and paste it.

Inside of fireworks(), write code that calls one_firework() to draw three fireworks:

You should be able to do this without modifying your one_firework() function, but you will need some glue code.