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DuckDB 连接器文档
DataBase 类
类说明
用于连接和管理DuckDB数据库,处理币安交易数据的存储、因子计算和查询操作
初始化方法
def __init__(
self,
cache_path: str | None = None,
db_path: str | None = None,
read_only: bool = True
)
参数说明:
cache_path: 本地缓存路径(可选)db_path: DuckDB数据库文件路径(可选,内存数据库如果未指定)read_only: 是否以只读模式打开数据库(默认True)
主要公有方法
更新K线数据
def update_klines(self)
功能:
- 遍历所有资产类别和时间频率,创建/更新K线数据表
- 自动处理不同时间粒度的数据聚合
- 进度条显示处理进度
更新因子数据
def update_factors(self)
功能:
- 计算动量(momentum)、波动率(volatility)、贝塔(beta)等因子
- 使用滑动窗口计算(窗口大小自动适配不同时间频率)
- 进度条显示处理进度
获取因子数据
def df_factors(
self,
symbols: list[str] | None = None,
freq: Literal["1m", "3m", "15m", "30m", "1h", "4h", "12h", "1d"] = "1m",
asset_class: Literal["spot", "um"] = "um",
start_date: str | None = None,
end_date: str | None = None,
order_by_timestamp: bool = False,
) -> pd.DataFrame
参数说明:
symbols: 交易对列表(可选,默认全部)freq: 时间频率(默认1分钟)asset_class: 资产类别(默认永续合约)start_date/end_date: 时间范围(ISO格式字符串)order_by_timestamp: 是否按时间排序
返回:
- 包含以下字段的DataFrame: timestamp, symbol, close, return, momentum, volatility, beta
获取原始K线数据
def df_klines(
self,
symbols: list[str] | None = None,
freq: Literal["1m", "3m", "15m", "30m", "1h", "4h", "12h", "1d"] = "1m",
asset_class: Literal["spot", "um"] = "um",
start_date: str | None = None,
end_date: str | None = None,
order_by_timestamp: bool = False,
) -> pd.DataFrame
参数同df_factors
返回:
- 包含以下字段的DataFrame: symbol, timestamp, open, high, low, close, volume, quote_volume, taker_buy_volume, taker_buy_quote_volume
获取因子矩阵
def factors_matrix(
self,
symbols: list[str] | None = None,
factor: Literal["return", "momentum", "volatility", "beta"] = "return",
freq: Literal["1m", "3m", "15m", "30m", "1h", "4h", "12h", "1d"] = "1m",
asset_class: Literal["spot", "um"] = "um",
start_date: str | None = None,
end_date: str | None = None,
) -> pd.DataFrame
特殊说明:
- 返回以时间为索引、交易对为列名的二维矩阵
- 使用PIVOT操作将纵向数据转换为横向矩阵
- 适合量化分析中的因子研究
获取所有交易对
def list_all_symbols(self, asset_class: Literal["spot", "um"] = "um", data_type: Literal["klines", "metrics"] = "klines") -> list[str]:
参数说明:
asset_class: 资产类别(默认永续合约)data_type: 数据类型(默认K线数据)
返回:
- 包含所有交易对的列表
异常类型
DBReadOnlyError: 尝试在只读模式下执行写操作时抛出DBError: 参数错误或无效操作时抛出
使用示例
# 初始化数据库连接
db = DataBase(db_path="binance.db", read_only=False)
# 更新数据
db.update_klines()
db.update_factors()
# 查询数据
df = db.df_factors(
symbols=["BTCUSDT", "ETHUSDT"],
freq="1h",
start_date="2023-01-01",
end_date="2023-01-31"
)
# 获取因子矩阵
matrix = db.factors_matrix(
factor="momentum",
freq="4h",
asset_class="um"
)
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