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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 width(self, add_quiet_zone=False):
 """Return the barcodes width in modules for a given data and character set combination. :param add_quiet_zone: Whether quiet zone should be included in the width. :return: Width of barcode in modules, which for images translates to pixels. """

        quiet_zone = self.quiet_zone if add_quiet_zone else 0
        return len(self.modules) + 2 * quiet_zone