Edhesive 6.8 lesson practice answers please

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Explanation:

import simplegui

import random

# global constants

WIDTH = 600

HEIGHT = 400

PARTICLE_RADIUS = 5

COLOR_LIST = ["Red", "Green", "Blue", "White"]

DIRECTION_LIST = [[1,0], [0, 1], [-1, 0], [0, -1]]

# definition of Particle class

class Particle:

  # initializer for particles

  def __init__(self, position, color):

      self.position = position

      self.color = color

  # method that updates position of a particle    

  def move(self, offset):

      self.position[0] += offset[0]

      self.position[1] += offset[1]

  # draw method for particles

  def draw(self, canvas):

      canvas.draw_circle(self.position, PARTICLE_RADIUS, 1, self.color, self.color)

  # string method for particles

  def __str__(self):

      return "Particle with position = " + str(self.position) + " and color = " + self.color

# draw handler

def draw(canvas):

  for p in particle_list:

      p.move(random.choice(DIRECTION_LIST))

  for p in particle_list:

      p.draw(canvas)

# create frame and register draw handler

frame = simplegui.create_frame("Particle simulator", WIDTH, HEIGHT)

frame.set_draw_handler(draw)

# create a list of particles

particle_list = []

for i in range(100):

  p = Particle([WIDTH / 2, HEIGHT / 2], random.choice(COLOR_LIST))

  particle_list.append(p)

# start frame

frame.start()

Explanation:

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