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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def delayed_redraw(self):
 """Handle delayed redrawing of the canvas."""


        # This is the optimized redraw method
        with self._defer_lock:
            # pick up the lowest necessary level of redrawing
            whence = self._defer_whence
            self._defer_whence = self._defer_whence_reset
            flag = self._defer_flag
            self._defer_flag = False

        if flag:
            # If a redraw was scheduled, do it now
            self.redraw_now(whence=whence)