keyboard input with pyglet

keyboard.py

import sys
from math import *
from pyglet.gl import *

window = pyglet.window.Window()


class Circle:
    def __init__(self,radius,r,g,b,x=0,y=0):
        self.r = r
        self.g = g
        self.b = b
        self.x = x
        self.y = y
        verts = [0,0]
        for angle in range(0,370,10):
            x = radius * cos(radians(angle))
            y = radius * sin(radians(angle))
            verts = verts + [x,y]
        self.vlist = pyglet.graphics.vertex_list(len(verts)/2, ('v2f',verts))
    def draw(self):
        glColor3f(self.r,self.g,self.b)
        glPushMatrix()
        glTranslatef(self.x, self.y ,0)
        self.vlist.draw(GL_TRIANGLE_FAN)
        glPopMatrix()
    def move_up(self):
        self.y += 10
    def move_down(self):
        self.y -= 10
    def move_left(self):
        self.x -= 10
    def move_right(self):
        self.x += 10


c = Circle(50,1,0,0,300,300)

@window.event
def on_draw():
    global c
    glClear(GL_COLOR_BUFFER_BIT)
    c.draw()

@window.event
def on_key_press(key, modifiers):
    global c
    if key == pyglet.window.key.UP:
        c.move_up()
    elif key == pyglet.window.key.DOWN:
        c.move_down()
    elif key == pyglet.window.key.RIGHT:
        c.move_right()
    elif key == pyglet.window.key.LEFT:
        c.move_left()

pyglet.app.run()