quant-source/demo_yf/demo.py

import os
os.environ["http_proxy"] = "http://127.0.0.1:7890"
os.environ["https_proxy"] = "http://127.0.0.1:7890"

# pip install yfinance
import yfinance as yf
from datetime import datetime

def crypto_last(ticker: str) -> float:
    """
    返回某个币对 USD 的最新收盘价（1m 线最近一次）
    ticker 示例: "BTC-USD", "ETH-USD", "SOL-USD"
    """
    data = yf.download(
        tickers=ticker,
        period="1d",
        interval="1m",
        auto_adjust=True,
        progress=False,
        threads=False
    )
    if data.empty:
        raise RuntimeError("yfinance 返回为空，可能 ticker 写错或网络问题")
    # 关键修正：把 Series 转成标量
    last_close = data["Close"].iloc[-1].item()
    return last_close

if __name__ == "__main__":
    pairs = ["BTC-USD", "ETH-USD", "SOL-USD", "SUI-USD"]
    for p in pairs:
        try:
            price = crypto_last(p)
        except Exception as e:
            print(e)
        print(f"{datetime.now():%Y-%m-%d %H:%M:%S}  {p}: {price}")