human
Write me a the Python program you requested given the following:
I am working on the file "Lecture-widgets.ipynb".
The first task is:
Improving the layout - using Sizers
Using absolute positioning is often not very satisfying: The result is ugly if the windows are not (for one reason or another) the right size. WxPython has very rich vocabulary of objects to lay out controls.
- wx.BoxSizer is the most common and simple layout object but it permits a vast range of possibilities. Its role is roughly to arrange a set of controls in a line or in a row and rearrange them when needed (i.e. when the global size is changed).
- wx.GridSizer and wx.FlexGridSizer are two very important layout tools. They arrange the controls in a tabular layout.
Here is the sample above re-written to use sizers:
Can you write Python program for it?
assistant
#Here is the Python program you requested.

%%writefile example.py
import wx
class ExamplePanel(wx.Panel):
    def __init__(self, parent):
        wx.Panel.__init__(self, parent)

        # create some sizers
        mainSizer = wx.BoxSizer(wx.VERTICAL)
        grid = wx.GridBagSizer(hgap=5, vgap=5)
        hSizer = wx.BoxSizer(wx.HORIZONTAL)

        self.quote = wx.StaticText(self, label="Your quote: ")
        grid.Add(self.quote, pos=(0,0))

        # A multiline TextCtrl - This is here to show how the events work in this program, don't pay too much attention to it
        self.logger = wx.TextCtrl(self, size=(200,300), style=wx.TE_MULTILINE | wx.TE_READONLY)

        # A button
        self.button =wx.Button(self, label="Save")
        self.Bind(wx.EVT_BUTTON, self.OnClick,self.button)

        # the edit control - one line version.
        self.lblname = wx.StaticText(self, label="Your name :")
        grid.Add(self.lblname, pos=(1,0))
        self.editname = wx.TextCtrl(self, value="Enter here your name", size=(140,-1))
        grid.Add(self.editname, pos=(1,1))
        self.Bind(wx.EVT_TEXT, self.EvtText, self.editname)
        self.Bind(wx.EVT_CHAR, self.EvtChar, self.editname)

        # the combobox Control
        self.sampleList = ['friends', 'advertising', 'web search', 'Yellow Pages']
        self.lblhear = wx.StaticText(self, label="How did you hear from us ?")
        grid.Add(self.lblhear, pos=(3,0))
        self.edithear = wx.ComboBox(self, size=(95, -1), 
                                    choices=self.sampleList, 
                                    style=wx.CB_DROPDOWN)
        grid.Add(self.edithear, pos=(3,1))
        self.Bind(wx.EVT_COMBOBOX, self.EvtComboBox, self.edithear)
        self.Bind(wx.EVT_TEXT, self.EvtText,self.edithear)

        # add a spacer to the sizer
        grid.Add((10, 40), pos=(2,0))

        # Checkbox
        self.insure = wx.CheckBox(self, label="Do you want Insured Shipment ?")
        grid.Add(self.insure, pos=(4,0), span=(1,2), 
                 flag=wx.BOTTOM, border=5)
       ...