Creating a custom toolbar in wxPython

custom_toolbar.py

import wx

########################################################################
class MyCustomToolbar(wx.Panel):
    """"""

    #----------------------------------------------------------------------
    def __init__(self, parent):
        """Constructor"""
        wx.Panel.__init__(self, parent)
        btn_size = (50, 50)
        
        top_sizer = wx.BoxSizer(wx.VERTICAL)
        tb_sizer = wx.BoxSizer(wx.HORIZONTAL)
        
        save_ico = wx.ArtProvider.GetBitmap(wx.ART_FILE_SAVE, wx.ART_TOOLBAR, (16,16))
        save_btn = wx.BitmapButton(self, size=btn_size, bitmap=save_ico)
        tb_sizer.Add(save_btn, 0, wx.ALL, 5)
        
        print_ico = wx.ArtProvider.GetBitmap(wx.ART_PRINT, wx.ART_TOOLBAR, (16,16))
        print_btn = wx.BitmapButton(self, size=btn_size, bitmap=print_ico)
        tb_sizer.Add(print_btn, 0, wx.ALL, 5)
        
        delete_ico = wx.ArtProvider.GetBitmap(wx.ART_DELETE, wx.ART_TOOLBAR, (16,16))
        delete_btn = wx.BitmapButton(self, size=btn_size, bitmap=delete_ico)
        tb_sizer.Add(delete_btn, 0, wx.ALL, 5)
        top_sizer.Add(tb_sizer)
        
        h_sizer = wx.BoxSizer(wx.HORIZONTAL)
        h_sizer.Add(wx.StaticLine(self), 1, wx.EXPAND)
        top_sizer.Add(h_sizer, 1, wx.EXPAND)
        
        self.SetSizer(top_sizer)
        
    
########################################################################
class MyPanel(wx.Panel):
    """"""

    #----------------------------------------------------------------------
    def __init__(self, parent):
        """Constructor"""
        wx.Panel.__init__(self, parent)
        
        main_sizer = wx.BoxSizer(wx.VERTICAL)
        
        toolbar = MyCustomToolbar(self)
        main_sizer.Add(toolbar, 0, wx.EXPAND)
        
        self.SetSizer(main_sizer)
    
########################################################################
class MainFrame(wx.Frame):
    """"""

    #----------------------------------------------------------------------
    def __init__(self):
        """Constructor"""
        wx.Frame.__init__(self, None, title="Custom Toolbar")
        panel = MyPanel(self)
        
        self.Show()
    
if __name__ == '__main__':
    app = wx.App(False)
    frame = MainFrame()
    app.MainLoop()