Websocket到Python中的可用数据-从GDAX websocket提要获取价格

import websocket
import json

def on_message(ws, message):
    data = json.loads(message)
    if 'price' in data:
        price = data['price']
        print("当前价格：", price)

def on_error(ws, error):
    print("发生错误：", error)

def on_close(ws):
    print("连接已关闭")

def on_open(ws):
    print("连接已打开")
    # 订阅价格更新
    ws.send(json.dumps({
        "type": "subscribe",
        "product_ids": [
            "BTC-USD"
        ],
        "channels": [
            "ticker"
        ]
    }))

if __name__ == "__main__":
    websocket.enableTrace(True)
    ws = websocket.WebSocketApp("wss://ws-feed.gdax.com",
                                on_message=on_message,
                                on_error=on_error,
                                on_close=on_close)
    ws.on_open = on_open
    ws.run_forever()