如何在wxpython窗口中添加滚动条，您可以查看两个垂直网格

Question

我的程序中有两个网格表，但是我只能看到一个没有滚动条的表。我用Boxsizer在Internet上看到了它，但是尝试后，网格的窗口很小。该表不清楚。下面是代码。我对Boxsizer和滚动条控件之间的设置关系不熟悉。

--编码：UTF-8--

import wx
import wx.grid
class TestTable(wx.grid.PyGridTableBase):#
    def __init__(self):
        wx.grid.PyGridTableBase.__init__(self)
        self.data = { (1,1) : 'Here',
        (2,2) : 'is',
        (3,3) : 'some',
        (4,4) : 'data',
        }
        self.odd=wx.grid.GridCellAttr()
        self.odd.SetBackgroundColour('sky blue')
        self.odd.SetFont(wx.Font(10, wx.SWISS, wx.NORMAL, wx.BOLD))
        self.even=wx.grid.GridCellAttr()
        self.even.SetBackgroundColour('sea green')
        self.even.SetFont(wx.Font(10, wx.SWISS, wx.NORMAL, wx.BOLD))
    # these five are the required methods
    def GetNumberRows(self):
        return 50
    def GetNumberCols(self):
        return 50
    def IsEmptyCell(self, row, col):
        return self.data.get((row, col)) is not None
    def GetValue(self, row, col):#
        value = self.data.get((row, col))
        if value is not None:
            return value
        else:
            return ''
    def SetValue(self, row, col, value):#
        self.data[(row,col)] = value
    # # the table can also provide the attribute for each cell
    def GetAttr(self, row, col, kind):
        attr = [self.even, self.odd][row % 2]
        attr.IncRef()
        return attr
class TestFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title='Grid Table',
        size=(640,480))
        grid = wx.grid.Grid(self)
        #first grid
        table = TestTable()
        grid.SetTable(table, True)
        # second grid
        le = TestTable()
        grid.SetTable(le, True)
app = wx.PySimpleApp()
frame = TestFrame()
frame.Show()
app.MainLoop()