keys check with set2

from tkinter import *
from random import randrange as rnd, choice, random
#from PIL import ImageTk, Image

root = Tk()
root.geometry('600x600+100+100')
canv = Canvas(bg='white')
canv.pack(fill=BOTH,expand=1)
colors = ('red','green')

class Ball():
    def __init__(self):
        self.x = 300
        self.y = 300
        self.color = 'orange'
        self.r = 15
        self.vx = 0
        self.vy = 0
        self.id = canv.create_oval(self.x-self.r,self.y-self.r,self.x+self.r,self.y+self.r,fill=self.color)
        self.move()

    def move(self):
        self.x += self.vx
        self.y += self.vy
        if self.y > 550:
            self.vy *= -1
        if self.y < 50:
            self.vy *= -1
        if self.x > 550:
            self.vx *= -1
        if self.x < 50:
            self.vx *= -1
        canv.coords(self.id,self.x-self.r,self.y-self.r,self.x+self.r,self.y+self.r)
        root.after(30,self.move)


class Platform_P1():
    def __init__(self):
        self.x = 250
        self.y = 550
        self.w = 100
        self.h = 17
        self.color = 'blue'
        self.vx = 0
        self.id = canv.create_rectangle(self.x,self.y,self.x+self.w,self.y+self.h,fill = self.color)
        self.move()

    def move(self):
        self.x += self.vx
        if self.x < 0:
            self.x = 0
            self.vx = 0
        if self.x > 500:
            self.x = 500
            self.vx = 0
        canv.coords(self.id,self.x,self.y,self.x+self.w,self.y+self.h)
        root.after(30,self.move)






def keyDown(event):
    keys.add(event.keycode)

def keyUp(event):
    keys.remove(event.keycode)

def check():
    print(keys)
    if 113 in keys:
        p1.vx = -10
    elif 114 in keys:
        p1.vx = 10
    else:
        p1.vx *= 0.5
    root.after(30,check)

keys = set()

p1 = Platform_P1()
ball = Ball()

root.bind('<Key>',keyDown)
root.bind('<KeyRelease>',keyUp)

check()




#~ def keyDown(event):
    #~ global state, vx, x
    #~ if event.keycode == 32:
        #~ if state == 'start':
            #~ KAZINO = rnd(1,3)
            #~ if KAZINO == 1:
                #~ ball.vy = 4
            #~ else:
                #~ ball.vy = -4
            #~ state = 'game'
    #~ if event.keycode == 37:
        #~ P1.vx = -4
    #~ if event.keycode == 39:
        #~ P1.vx = 4
    #~ checker()

#~ def checker(event):
    #~ global vx
    #~ if event.keycode != 37:
        #~ P1.vx = 0
    #~ root.after(1,checker)


#state = 'start'
root.mainloop()