code: def QA_fetch_stock_xdxr(code, format='pd', collections=DATABASE.stock_xdxr):
      '获取股票除权信息/数据库'
      code = QA_util_code_tolist(code)
      data = pd.DataFrame([item for item in collections.find(
          {'code':  {'$in': code}}, batch_size=10000)]).drop(['_id'], axis=1)
      data['date'] = pd.to_datetime(data['date'])
      return data.set_index('date', drop=Falsef QA_fetch_stock_xdxr(code, format='pd', collections=DATABASE.stock_xdxr):
      '获取股票除权信息/数据库'
      code = QA_util_code_tolist(code)
      data = pd.DataFrame([item for item in collections.find(
          {'code':  {'$in': code}}, batch_size=10000)]).drop(['_id'], axis=1)
      data['date'] = pd.to_datetime(data['date'])
      return data.set_index('date', drop=False)
docs: 获取股票除权信息/数据库