68     def add_tab(self, tab_name):  argument
70         if not tab_name:
71             raise InvalidNameError("Invalid Tab name: '%s'" % tab_name)
72         if tab_name in self._tab_names:
73             raise AlreadyExistsError("Tab named '%s' already exists" %tab_name)
75         self._tab_names.append(tab_name)
78     def remove_tab(self, tab_name):  argument
80         if not tab_name in self._tab_names:
83         self._tab_names.remove(tab_name)
86     def set_selected_tab(self, tab_name):  argument
88         if tab_name == self._selected_tab:
90         if tab_name is not None and tab_name not in self._tabs:
98         if tab_name is not None:
100             self._selected_tab = tab_name
101             tab = self._tabs[tab_name]
116         for tab_name in tab_names:
117             tab = TabSet.TabButton(tab_name, self.select_command,
123             self._tabs[tab_name] = tab
146         for tab_name in self._tabs.keys():
147             self._tabs.pop(tab_name).destroy()