我正在尝试使用python-binance运行binance WebSocket API的示例代码，并遵循此教程：https://livedataframe.com/live-cryptocurrency-data-python-tutorial/
不幸的是，我不能让它工作。WebSocket只是不响应什么结果在空终端没有任何打印出来。
我用的是python 3.7.8，PyCharm IDE，Windows 10
请帮帮忙，谢谢！

import time
from binance.client import Client # Import the Binance Client
from binance.websockets import BinanceSocketManager # Import the Binance Socket Manager

_API_KEY = "mykey"
_API_SECRET = "mykey"

client = Client(_API_KEY, _API_SECRET)

# Instantiate a BinanceSocketManager, passing in the client that you instantiated
bm = BinanceSocketManager(client)

# This is our callback function. For now, it just prints messages as they come.
def handle_message(msg):
    print(msg)

# Start trade socket with 'ETHBTC' and use handle_message to.. handle the message.
conn_key = bm.start_trade_socket('ETHBTC', handle_message)
# then start the socket manager
bm.start()

# let some data flow..
time.sleep(10)

# stop the socket manager
bm.stop_socket(conn_key)

另外，我可以运行这段代码，但WebSocket API似乎不适合我。

from binance.client import Client

_API_KEY = "key"
_API_SECRET = "key"

client = Client(_API_KEY, _API_SECRET)
btc_price = client.get_symbol_ticker(symbol="BTCUSDT")
# print full output (dictionary)
print(btc_price)