def check_stocks(context):
    # 获取沪深成分股
    security = get_index_stocks(g.stockindex)

    Stocks = get_fundamentals(query(
            valuation.code,
            valuation.pb_ratio,
            balance.total_assets,
            balance.total_liability,
            balance.total_current_assets,
            balance.total_current_liability
        ).filter(
            valuation.code.in_(security),
            valuation.pb_ratio < 2, #市净率低于2
            balance.total_current_assets/balance.total_current_liability > 1.2 #流动资产至少是流动负债的1.2倍
        ))
    
    # 计算股票的负债比例
    Stocks['Debt_Asset'] = Stocks['total_liability']/Stocks['total_assets']
    # 获取负债比率的市场均值
    me = Stocks['Debt_Asset'].median()
    # 获取满足上述条件的股票列表
    Codes = Stocks[Stocks['Debt_Asset'] > me].code

    return list(Codes)

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