turtlest.ipynb

import turtle
turtle.clear()
wn = turtle.Screen()

last_pressed = 'up'

def setup(col, x, y, w, s, shape):
  turtle.up()
  turtle.goto(x,y)
  turtle.width(w)
  turtle.turtlesize(s)
  turtle.color(col)
  turtle.shape(shape)
  turtle.lt(90)
  turtle.down()
  wn.onkey(up, "Up")
  wn.onkey(left, "Left")
  wn.onkey(right, "Right")
  wn.onkey(back, "Down")
  wn.onkey(quitTurtles, "Escape")
  wn.listen()
  wn.mainloop()


#Event handlers
def up():
  global last_pressed
  if last_pressed == 'left':
    turtle.rt(90)
    turtle.fd(10)
  elif last_pressed == 'right':
    turtle.lt(90)
    turtle.fd(10)
  elif last_pressed == 'up':
    turtle.fd(10)
  else:
    turtle.rt(180)
    turtle.fd(10)

  last_pressed = 'up'

def left():
  global last_pressed
  if last_pressed == 'left':
    turtle.fd(10)
  elif last_pressed == 'right':
    turtle.lt(180)
    turtle.fd(10)
  elif last_pressed == 'up':
    turtle.lt(90)
    turtle.fd(10)
  else:
    turtle.rt(90)
    turtle.fd(10)

  last_pressed = 'left'


def right():
  global last_pressed
  if last_pressed == 'left':
    turtle.rt(180)
    turtle.fd(10)
  elif last_pressed == 'right':
    turtle.fd(10)
  elif last_pressed == 'up':
    turtle.rt(90)
    turtle.fd(10)
  else:
    turtle.lt(90)
    turtle.fd(10)

  last_pressed = 'right'

def back():
  global last_pressed
  if last_pressed == 'left':
    turtle.lt(90)
    turtle.fd(10)
  elif last_pressed == 'right':
    turtle.rt(90)
    turtle.fd(10)
  elif last_pressed == 'up':
    turtle.rt(180)
    turtle.fd(10)
  else:
    turtle.fd(10)

  last_pressed = 'down'

def quitTurtles():
  wn.bye()

setup("blue",-200,200,2,2,"turtle")