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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 click(self):
 """Click the element :returns: page element instance """

        try:
            self.wait_until_clickable().web_element.click()
        except StaleElementReferenceException:
            # Retry if element has changed
            self.web_element.click()
        return self