[WxPython] [Very Basic Example Only] Hello World

[Yoriz]

About the only time I don't use -1 for the id is for menu and toolbar items.
for instance my menu and toolbar has an edit the menu item would use wx.ID_EDIT.

menu_edit = wx.MenuItem(menu_edit_group, wx.ID_EDIT, 'Edit',
    'Edit the selected item')

and then the toolbar widget would be

tool_bar.AddTool(wx.ID_EDIT, 'Edit', page_edit16.GetBitmap(), wx.NullBitmap,
    wx.ITEM_NORMAL, 'Edit the selected item', 'Edit the selected item')

then an event that enables/disable the controls         

self.Bind(wx.EVT_UPDATE_UI, self.on_update_on_selection, id=wx.ID_EDIT)

which is bound to

def on_update_on_selection(self, event):
    event.Enable(self.has_selection)

In general setting your own id is not needed because you access the widget by the python object linked to them.
The id is just used internally by wxwidgets to track widgets and tie events to widgets ect.

Note: there is a default attribute that can be used which has a value of -1

>>> wx.ID_ANY
-1