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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 colorbrewer2_url(self):
 """ URL that can be used to view the color map at colorbrewer2.org. """

        url = 'http://colorbrewer2.org/index.html?type={0}&scheme={1}&n={2}'
        return url.format(self.type.lower(), self.name, self.number)