parameters: (self)
docstring: Perform a Turtle-data update.
docstring_summary: Perform a Turtle-data update.
docstring_tokens: Perform a Turtle - data update .
function: def _update(self):
          """Perform a Turtle-data update.
          """
          screen = self.screen
          if screen._tracing == 0:
              return
          elif screen._tracing == 1:
              self._update_data()
              self._drawturtle()
              screen._update()                  # TurtleScreenBase
              screen._delay(screen._delayvalue) # TurtleScreenBase
          else:
              self._update_data()
              if screen._updatecounter == 0:
                  for t in screen.turtles():
                      t._drawturtle()
                  screen._update()
function_tokens: def _update ( self ) : screen = self . screen if screen . _tracing == 0 : return elif screen . _tracing == 1 : self . _update_data ( ) self . _drawturtle ( ) screen . _update ( ) # TurtleScreenBase screen . _delay ( screen . _delayvalue ) # TurtleScreenBase else : self . _update_data ( ) if screen . _updatecounter == 0 : for t in screen . turtles ( ) : t . _drawturtle ( ) screen . _update ( )