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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 parse(self, data, charset=None):
 """ Parse the data. It is usually a better idea to override ``_parse_data()`` than this method in derived classes. :param charset: the charset of the data. Uses datamapper's default (``self.charset``) if not given. :returns: """


        charset = charset or self.charset
        return self._parse_data(data, charset)