Question

我会在此页面https://www.betexplorer.com/soccer/russia/premier-league/results/中抓取开局赔率我尝试了这段代码：

   try:
        driver.find_element_by_xpath("//td[a[.='bet365']]/following-sibling::td[span]")
    except NoSuchElementException:
        homeodd = 'no bet365 odd'
        drawodd = 'no bet365 odd'
        awayodd = 'no bet365 odd'
    else:
        driver.find_element_by_xpath("//*[@id='sortable-1']/tbody/tr[6]/td[4]").click()
        sleep(3)
        homeodd = driver.find_element_by_xpath("//table[ends-with(@id,'16')]//tr[th='Opening odds']/following-sibling::tr/td[@class='bold']").text
        print(homeodd)
        driver.find_element_by_xpath("//*[@id='sortable-1']/tbody/tr[6]/td[5]").click()
        sleep(3)
        drawodd = driver.find_element_by_xpath("//table[ends-with(@id,'16')]//tr[th='Opening odds']/following-sibling::tr/td[@class='bold']").text
        print(drawodd)
        driver.find_element_by_xpath("//*[@id='sortable-1']/tbody/tr[6]/td[6]").click()
        sleep(3)
        awayodd = driver.find_element_by_xpath("//table[ends-with(@id,'16')]//tr[th='Opening odds']/following-sibling::tr/td[@class='bold']").text
        print(awayodd)

我有此错误：SyntaxError：无法在'Document'上执行'evaluate'：字符串'// table [ends-with（@ id，'16'）] // tr [th ='Openingodds' ] / following-sibling :: tr / td [@ class ='bold']'不是有效的XPath表达式。但是我错了xpath语法。

问题在于，此页面中没有属性data-opening-odd。我在上一篇文章中问了另外一个scraping with selenium web driver，并在社区的一个很好的建议下，我找到了一个很好的解决方案

try:
        driver.find_element_by_xpath("//td[a[.='bet365']]/following-sibling::td[span]")
    except NoSuchElementException:
        homeodd = 'no bet365 odd'
        drawodd = 'no bet365 odd'
        awayodd = 'no bet365 odd'
    else:
        homeodd = WebDriverWait(driver, 20).until(EC.visibility_of_element_located((By.XPATH, '//td[a[.="bet365"]]/following-sibling::td[span][1]'))).get_attribute("data-opening-odd")
        drawodd = WebDriverWait(driver, 20).until(EC.visibility_of_element_located((By.XPATH, '//td[a[.="bet365"]]/following-sibling::td[span][2]'))).get_attribute("data-opening-odd")
        awayodd = WebDriverWait(driver, 20).until(EC.visibility_of_element_located((By.XPATH, '//td[a[.="bet365"]]/following-sibling::td[span][3]'))).get_attribute("data-opening-odd")

有人建议采用第二种解决方案，而不会从属性data-opening-odd中获得赔率吗？谢谢

Answer 1

ends-with函数来自XPath 2.0，但浏览器仍仅支持XPath 1.0。最简单的方法是更换

table[ends-with(@id,'16')]

使用

table[contains(@id,'16')]

或更复杂的表达方式：

table[substring(@id, string-length(@id) - string-length('16') + 1) = '16']

Answer 2

一个简单的解决方案是使用一个名为Parse Hub的软件：https://www.parsehub.com/quickstart

您可以使用它来剪贴任何网站的数据！它真的很容易使用如果您需要使用它方面的任何帮助，请告诉我，请您帮个忙，但我认为YouTube教程可能足以了解如何使用它！

使用Selenium Python进行网络抓取

2 个答案: