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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 go_to(self, url_or_text):
 """Go to page utl."""

        if is_text_string(url_or_text):
            url = QUrl(url_or_text)
        else:
            url = url_or_text
        self.notebookwidget.load(url)