Pong python, blue paddle(left)

Question

Hello everyone :),

I have this code, that I have been doing today from a tutorial video for learn by doing. but my left paddle doesn't interact with the ball. while the right one does. I am not able to see the problem. could anyone tell me if they can see what I am doing wrong.

thank you in advance!

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import turtle

wn = turtle.Screen()
wn.title("pong")
wn.bgcolor("gray")
wn.setup(width=800, height=600)
wn.tracer(0)

#paddle A
paddle_a = turtle.Turtle()
paddle_a.speed(0)
paddle_a.shape("square")
paddle_a.color("blue")
paddle_a.shapesize(stretch_wid=5, stretch_len=1)
paddle_a.penup()
paddle_a.goto(-350, 0)

#paddle B
paddle_b = turtle.Turtle()
paddle_b.speed(0)
paddle_b.shape("square")
paddle_b.color("red")
paddle_b.shapesize(stretch_wid=5, stretch_len=1)
paddle_b.penup()
paddle_b.goto(350, 0)

#Ball
ball = turtle.Turtle()
ball.speed(0)
ball.shape("square")
ball.color("yellow")
ball.penup()
ball.goto(0, 0)
ball.dx = 1
ball.dy = -1

#funtion paddle A

def paddle_a_up():
y = paddle_a.ycor()
y += 30
paddle_a.sety(y)

def paddle_a_down():
y = paddle_a.ycor()
y -= 30
paddle_a.sety(y)

def paddle_b_up():
y = paddle_b.ycor()
y += 30
paddle_b.sety(y)

def paddle_b_down():
y = paddle_b.ycor()
y -= 30
paddle_b.sety(y)

#keyboard binding

wn.listen()
wn.onkeypress(paddle_a_up, "w")
wn.onkeypress(paddle_a_down, "s")
wn.onkeypress(paddle_b_up, "Up")
wn.onkeypress(paddle_b_down, "Down")

#main game loop

while True:
wn.update()

#move the ball
ball.setx(ball.xcor() + ball.dx)
ball.sety(ball.ycor() + ball.dy)

#border checking
if ball.ycor() > 290:
ball.sety(290)
ball.dy *=-1

if ball.ycor() < -290:
ball.sety(-290)
ball.dy *=-1

if ball.xcor() > 390:
ball.goto(0, 0)
ball.dx *= -1

if ball.x

Answer 1

if ball.xcor() < -390:
ball.goto(0, 0)
ball.dx *= -1

#paddle and ball collisions

if (ball.xcor() > 340 and ball.xcor() < 350) and (ball.ycor() < paddle_b.ycor() + 40 and ball.ycor() > paddle_b.ycor() - 40):
ball.setx(340)
ball.dx *= -1
if (ball.xcor() < -340 and ball.xcor() > -350) and (ball.ycor() > paddle_a.ycor() + 40 and ball.ycor() < paddle_a.ycor() - 40):
ball.setx(-340)