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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 paddingsize2(self, realsize):
        '''
        Return a padded size from realsize, for NamedStruct internal use.
        '''
        if self.base is not None:
            return self.base.paddingsize2(realsize)
        return (realsize + self.padding - 1) // self.padding * self.padding