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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_normalize(self, width):
 """ Handle a width style, which can be a fractional number representing a percentage of available width or positive integers which indicate a fixed width. """

        if width is not None:
            if width > 0 and width < 1:
                return int(width * self.usable_width)
            else:
                return int(width)