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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_latex(self):
 """ Returns a LaTeX representation of an attribute-value matrix """

        latex = r"[{} " 
        for attribute, value in self:
            if attribute in ['speaker_model', 'is_in_commonground']: continue
            value_l = value.to_latex()
            if value_l == "": continue
            latex += "{attribute:<15} &  {value:<20} \\\\ \n".format(attribute=attribute, value=value_l)
        latex += "]\n"
        return latex