selenium.py 文件源码

def _goto_next_page(self):
        """
        Click the next page element,

        Returns:
            The url of the next page or False if there is no such url
                (end of available pages for instance).
        """
        next_url = ''
        element = self._find_next_page_element()

        if hasattr(element, 'click'):
            next_url = element.get_attribute('href')
            try:
                element.click()
            except WebDriverException:
                # See http://stackoverflow.com/questions/11908249/debugging-element-is-not-clickable-at-point-error
                # first move mouse to the next element, some times the element is not visibility
                selector = self.next_page_selectors[self.search_engine_name]
                if selector:
                    try:
                        next_element = WebDriverWait(self.webdriver, 5).until(
                            EC.presence_of_element_located((By.CSS_SELECTOR, selector)))
                        webdriver.ActionChains(self.webdriver).move_to_element(next_element).perform()
                        # wait until the next page link emerges
                        WebDriverWait(self.webdriver, 8).until(
                            EC.visibility_of_element_located((By.CSS_SELECTOR, selector)))
                        element = self.webdriver.find_element_by_css_selector(selector)
                        next_url = element.get_attribute('href')
                        element.click()
                    except WebDriverException:
                        pass

        # wait until the next page was loaded

        if not next_url:
            return False
        else:
            return next_url