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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 label_rows(self, labels, font_size=15, text_buffer=1.5):
 """Label rows. Parameters labels : list of strings Labels. font_size : number (optional) Font size. Default is 15. text_buffer : number Buffer around text. Default is 1.5. """

        for i in range(len(self.subplots)):
            plot = self.subplots[i][-1]
            plot.text(
                text_buffer,
                0.5,
                labels[i],
                fontsize=font_size,
                verticalalignment="center",
                horizontalalignment="center",
            )