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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 get_html_string(self):

 """Generates if need be and returns a simpler html string with
 extracted text"""

        if self.__htmltree is not None:
            return htmltostring(self.__htmltree)
        else:
            self.__make_tree()
            return htmltostring(self.__htmltree)