Tkinter reference: A GUI for Python

w.focus_set()If w’s application has the input focus, the focus will jump to w. If w’s application doesn’thave focus, Tk will remember to give it to w next the application gets focus.w.grab_current()If there is a grab in force for w’s display, return its identifier, otherwise return None. Referto Events, below, for a discussion of grabs.w.grab_release()If w has a grab in force, release it.w.grab_set()Widget w grabs all events for w’s application. If there was another grab in force, it goesaway. See Events, below, for a discussion of grabs.w.grab_set_global()Widget w grabs all events for the entire screen. This is considered impolite and shouldbe used only in great need. Any other grab in force goes away.w.grab_status()If there is a local grab in force (set by .grab_set()), this method returns the string"local". If there is a global grab in force (from .grab_set_global()), it returns"global". If no grab is in force, it returns None.w.image_names()Returns the names of all the images in w’s application as a sequence of strings.w.keys()Returns the option names for the widget as a sequence of strings.w.mainloop()This method must be called, generally after all the static widgets are created, to startprocessing events. You can leave the main loop with the .quit() method (below). Youcan also call this method inside an event handler to resume the main loop.w.nametowidget ( name )This method returns the actual widget whose path name is name. The path name for anywidget x is str(x); see also the .winfo_pathname() method, below.w.option_add ( pattern, value, priority=None )This method adds default option values to the Tkinter option database. The pattern isa string that specifies a default value for options of one or more widgets. The priorityvalues are one of:widgetDefault Level 20, for global default properties of widgets.startupFile Level 40, for default properties of specificapplications.userDefaultLevel 60, for options that come from user files suchas their .Xdefaults file.interactiveLevel 80, for options that are set after the applicationstarts up. This is the default priority level.New Mexico Tech Computer Center Tkinter reference: Universal widget methods Page 64