如何在ObjectListView中更改单个单元格的背景色/前景色

# 导入必要的模块
import wx
from ObjectListView import ObjectListView, ColumnDefn

class MyObject:
    def __init__(self, name, color):
        self.name = name
        self.color = color

# 创建主界面
class MainFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY, "ObjectListView Demo", size=(400, 300))
        
        # 创建ObjectListView控件
        self.objectListView = ObjectListView(self, wx.ID_ANY, style=wx.LC_REPORT|wx.SUNKEN_BORDER)
        
        # 定义列
        columns = [
            ColumnDefn("名称", "left", 120, "name"),
            ColumnDefn("颜色", "left", 120, "color"),
        ]
        self.objectListView.SetColumns(columns)
        
        # 添加数据项
        objects = [
            MyObject("单元格1", "Red"),
            MyObject("单元格2", "Green"),
            MyObject("单元格3", "Blue"),
        ]
        self.objectListView.SetObjects(objects)
        
        # 更改单元格的背景色
        item = self.objectListView.GetItem(1)  # 获取第二行的数据项
        subItem = item.GetSubItem(1)  # 获取第二列的数据
        if subItem.GetText() == "Green":
            subItem.SetBackgroundColour(wx.Colour(255, 255, 0))  # 设置背景色为黄色
            subItem.SetTextColour(wx.Colour(0, 0, 0))  # 设置前景色为黑色
        
        # 布局界面
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.objectListView, 1, wx.EXPAND)
        self.SetSizer(sizer)

if __name__ == "__main__":
    app = wx.App()
    frame = MainFrame()
    frame.Show()
    app.MainLoop()