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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 to_python_(self, table_name: str="data") -> list: """Convert the main dataframe to python a python list :param table_name: python variable name, defaults to "data" :param table_name: str, optional :return: a python list of lists with the data :rtype: str :example: ``ds.to_python_("myvar")`` """

        try:
            renderer = pytablewriter.PythonCodeTableWriter
            data = self._build_export(renderer, table_name)
            return data
        except Exception as e:
            self.err(e, "Can not convert data to python list")