Python in a Nutshell

Name

protocol

Synopsis

                        T.protocol(protocol_name,callable)

By calling protocol with a first argument of 'WM_DELETE_WINDOW' (the only meaningful protocol on most platforms), you install callable as the handler for attempts by the user to close T through the window manager (for example by clicking on the X in the upper right corner on Windows and KDE). Python then calls callable without arguments when the user makes such an attempt. callable itself must call T .destroy( ) in order to close T, otherwise T stays open. By default, if T .protocol has not been called, such attempts implicitly call T .destroy( ) and thus unconditionally close T.