code: def execute(self):
          
          if not super().execute():
              return False
  
          self.printer.add_filter(PrettyPrinterNumbers(self.todolist))
          self._process_flags()
  
          if self.from_file:
              try:
                  new_todos = self.get_todos_from_file()
  
                  for todo in new_todos:
                      self._add_todo(todo)
              except (IOError, OSError):
                  self.error('File not found: ' + self.from_file)
          else:
              if self.text:
                  self._add_todo(self.text)
              else:
                  self.error(self.usage())
docs: Adds a todo item to the list.