from abc import ABC, abstractmethod
import pandas as pd


class DataSource(ABC):
    """数据源基类"""

    @abstractmethod
    def try_connection(self):
        """尝试连接行情"""
        pass

    @abstractmethod
    def get_historical_data(self, symbol: str, start_date: str, end_date: str, interval: str = "1d") :
        """获取历史数据"""
        pass

    @abstractmethod
    def get_realtime_data(self, symbol: str) :
        """获取实时数据"""
        pass