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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 set_contrast(self, contrast):
 """Sets the contrast of the display. Contrast should be a value between 0 and 255."""

        if contrast < 0 or contrast > 255:
            raise ValueError('Contrast must be a value from 0 to 255 (inclusive).')
        self.command(SSD1306_SETCONTRAST)
        self.command(contrast)