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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 _add_punctuation_spacing(self, input):
        '''
        Adds additional spacing to punctuation characters. For example,
        this puts an extra space after a fullwidth full stop.
        '''
        for replacement in punct_spacing:
            input = re.sub(replacement[0], replacement[1], input)

        return input