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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 _draw_linenumber(self, posno, lineno):
 """ Remember a line number drawable to paint later. """

        self._draw_text(
            self._get_linenumber_pos(posno),
            str(lineno).rjust(self.line_number_chars),
            font=self.fonts.get_font(self.line_number_bold,
                                     self.line_number_italic),
            fill=self.line_number_fg,
        )