我怎样才能从bloomberg上抓取这张表并获得熊猫数据帧呢？

import pandas as pd
import blpapi

# 创建 Bloomberg 会话
sessionOptions = blpapi.SessionOptions()
session = blpapi.Session(sessionOptions)

# 启动会话
if not session.start():
    print("无法启动 Bloomberg 会话")
    sys.exit(1)

# 进行身份验证
if not session.openService("//blp/apiauth"):
    print("无法打开身份验证服务")
    sys.exit(1)

# 进行身份验证请求
identityService = session.getService("//blp/apiauth")
authRequest = identityService.createAuthorizationRequest()
authRequest.set("clientId", "YOUR_CLIENT_ID")
authRequest.set("clientSecret", "YOUR_CLIENT_SECRET")
session.sendAuthorizationRequest(authRequest)

# 创建数据请求
request = session.createRequest("ReferenceDataRequest")
request.append("securities", "AAPL US Equity")
request.append("fields", "PX_LAST")
request.set("overrides", overrideDict)

# 发送数据请求
session.sendRequest(request)

# 处理响应
while(True):
    # 等待下一个事件
    event = session.nextEvent()
    
    # 处理事件类型
    if event.eventType() == blpapi.Event.RESPONSE or event.eventType() == blpapi.Event.PARTIAL_RESPONSE:
        # 解析数据并转换为熊猫数据帧
        data = []
        for msg in event:
            securityData = msg.getElement("securityData")
            fieldData = securityData.getElement("fieldData")
            data.append([
                securityData.getElementAsString("security"),
                fieldData.getElementAsString("PX_LAST")
            ])
        df = pd.DataFrame(data, columns=["Security", "PX_LAST"])
        break

# 关闭会话
session.stop()