python - Selenium webdriver xpath 过滤

Question

我的 xpath 语法有什么问题？我试图过滤的节点是，我的代码是:

div class="cmeTableBlockWrapper cmeContentSection cmeContentGroup"
table id="quotesFuturesProductTable1" 
tr[1:]
   td id="quotesFuturesProductTable1_ZCZ4_last"
   td id="quotesFuturesProductTable1_ZCZ4_change"
   td id="quotesFuturesProductTable1_ZCZ4_priorSettle"

url = "http://www.cmegroup.com/trading/agricultural/grain-and-oilseed/corn.html"

driver = webdriver.Chrome() 

driver.get(url) 

table = driver.find_element_by_xpath('//div[class="cmeTableBlockerWrapper cmeContentSection cmeContentGroup"]/table[@id="quotesFuturesProductTable1"]') 

# or table = driver.find_element_by_xpath('//td[contains(div[@class="fixedpage_heading"], "CORN")]/table[@class="homepage_quoteboard"]')

for row in table.find_elements_by_tag_name('tr')[1:]:  
    priorsettle = str(row.find_element_by_id('quotesFuturesProductTable1_ZSX4_priorSettle').text)

Answer 1

查找表格by id ，通过索引获取适当的行(这里最简单的方法):

table = driver.find_element_by_id('quotesFuturesProductTable1')
for row in table.find_elements_by_tag_name('tr')[2:]:
    print row.find_elements_by_tag_name('td')[4].text

打印(先前解决列):

338'2
350'6
359'2
366'2
374'0
384'2
393'6
400'4
404'4
402'0
402'0
418'2
407'4

请注意，我们需要跳过 2 行，而不是一行，因为在实际表格内容开始之前有两个 tr 标记。