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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, filename='', debuglevel=0):
 """ Parse given data. data: A string containing the filter definition filename: Name of the file being parsed (for meaningful error messages) debuglevel: Debug level to yacc """

        self.lexer.filename = filename
        self.lexer.reset_lineno()
        if not data or data.isspace():
            return []
        return self.parser.parse(data, lexer=self.lexer, debug=debuglevel)