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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 _update_values_in_window(self):
 """Update which values are in the current window."""

        window_bound_upper = self._window_bound_lower + self.window_size
        self._x_in_window = self.x[self._window_bound_lower:window_bound_upper]
        self._y_in_window = self.y[self._window_bound_lower:window_bound_upper]