screen.onkey python
from turtle import Turtle, Screen
screen = Screen()
screen.setup(1200, 500)
# Ground
ground = Turtle()
ground.speed('fastest')
ground.penup()
ground.goto(-1000, -200)
ground.pendown()
ground.forward(2000)
# Player
player = Turtle()
player.speed('fastest')
PlayerX = -600
def moveX():
global PlayerX
screen.onkeypress(None, "w") # disable handler in handler
player.clear()
player.penup()
player.goto(PlayerX, -99)
player.pendown()
player.color("Slate Gray")
player.begin_fill()
player.circle(-50)
player.end_fill()
PlayerX -= 1
screen.onkeypress(moveX, "w") # reenable handler
screen.listen()
moveX()
screen.mainloop() # change import & use turtle.mainloop() if Python 2
Worrisome Walrus