how to get the hand data from vuer's Hand API

[jiqimao-1]

Hello,when i run hand_tracking's example:

from vuer import Vuer, VuerSession
from vuer.schemas import Hands
from asyncio import sleep

app = Vuer()

@app.add_handler("HAND_MOVE")
async def handler(event, session):
print(f"Movement Event: key-{event.key}", event.value)

@app.spawn(start=True)
async def main(session: VuerSession):
# Important: You need to set the stream option to True to start
# streaming the hand movement.
session.upsert @ Hands(stream=True, key="hands")

while True:
    await sleep(1)

The terminal always show "event.value",but i can't get the data what i want.
I don't konw how to do.
Please help me,thank you.
The following i don't konw how to use in my python script.
/**

• Left and right pose are relative to the wrist transformations.
  */
  export type HandsData = {
  left?: Float32Array; // 25 * 16 values.
  right?: Float32Array; // 25 * 16 values.
  leftState: HandState;
  rightState: HandState;
  };

export type HandState = {
pinch: boolean;
squeeze: boolean;
tap: boolean;

pinchValue: number;
squeezeValue: number;
tapValue: number;
}

[jiqimao-1]

when i use the vuer==0.0.35,nothing shows on the ternimal