My apologies. This error occurs because the ```range``` statement can't take a ```float``` argument. To correct this, you can replace
```python
    if int(ball_pos[0]) <= BALL_RADIUS + PAD_WIDTH and int(ball_pos[1]) in range(
        paddle1_pos[1] - HALF_PAD_HEIGHT, paddle1_pos[1] + HALF_PAD_HEIGHT, 1
    ):
```

with
```python
    if int(ball_pos[0]) <= BALL_RADIUS + PAD_WIDTH and int(ball_pos[1]) in range(
        int(paddle1_pos[1] - HALF_PAD_HEIGHT), int(paddle1_pos[1] + HALF_PAD_HEIGHT, 1)
    ):
```

and 
```python
    if int(ball_pos[0]) >= WIDTH + 1 - BALL_RADIUS - PAD_WIDTH and int(
        ball_pos[1]
    ) in range(paddle2_pos[1] - HALF_PAD_HEIGHT, paddle2_pos[1] + HALF_PAD_HEIGHT, 1):
```

with
```python
    if int(ball_pos[0]) >= WIDTH + 1 - BALL_RADIUS - PAD_WIDTH and int(
        ball_pos[1]
    ) in range(int(paddle2_pos[1] - HALF_PAD_HEIGHT), int(paddle2_pos[1] + HALF_PAD_HEIGHT, 1)):
```

While I was analyzing this error, I noticed that this code treats the ball as a point, even though it is drawn according to ```BALL_RADIUS```. If you would like the code to match the visuals more closely, you can replace the same ```if``` statements with
```python
    if int(ball_pos[0]) <= BALL_RADIUS + PAD_WIDTH and int(ball_pos[1]) in range(
        int(paddle1_pos[1] - HALF_PAD_HEIGHT - BALL_RADIUS), int(paddle1_pos[1] + HALF_PAD_HEIGHT + BALL_RADIUS, 1)
    ):
```

and
```python
    if int(ball_pos[0]) >= WIDTH + 1 - BALL_RADIUS - PAD_WIDTH and int(
        ball_pos[1]
    ) in range(int(paddle2_pos[1] - HALF_PAD_HEIGHT - BALL_RADIUS), int(paddle2_pos[1] + HALF_PAD_HEIGHT + BALL_RADIUS, 1)):
```
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