def retry(f, n_attempts=3):
    # 包装函数，在函数异常时尝试多次调用，这里是尝试3次
    def wrapper(*args, **kwargs):
        for i in range(n_attempts):
            try:
                return f(*args, **kwargs)
            except Exception:
                if i == n_attempts - 1:
                    raise
    return wrapper

# 金融数据包
import tushare as ts
# 避免某次调用get_hs300s方法失败
hs300 = retry(ts.get_hs300s)()