<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def bring_tab_to_the_top(self, tab_label):
 """Find tab with label tab_label in list of notebook's and set it to the current page. :param tab_label: String containing the label of the tab to be focused """

        page = self.page_dict[tab_label]
        for notebook in self.notebook_names:
            page_num = self[notebook].page_num(page)
            if not page_num == -1:
                self[notebook].set_current_page(page_num)
                break