比如如下地址的淘宝商品详情页：
https://item.taobao.com/item....

编写Python代码如下：

def getValueUsingPhantomJS(url,cssSelector):

    from selenium import webdriver
    from time import sleep

    driver = webdriver.PhantomJS(executable_path=r'D:\phantomjs-2.1.1-windows\bin\phantomjs.exe')
    driver.get(url)

    sleep(5)
    driver.get_screenshot_as_file('test3.png')
    element1 = driver.find_element_by_css_selector(cssSelector)

    print(element1.text)
    return element1.text


# sellCounter = getValueUsingPhantomJS("https://detail.tmall.com/item.htm?id=535551057548&ns=1&abbucket=0","#J_DetailMeta li.tm-ind-item.tm-ind-sellCount > p > span.tm-count")
sellCounter = getValueUsingPhantomJS("https://item.taobao.com/item.htm?id=543877898669&ns=1&abbucket=0#detail","#J_SellCounter")
print( sellCounter )

最后得到的“交易成功”数据总显示空，试着将网页快照保存为图片(代码中的test3.png)，发现是有该数据的（目前这个商品的数据是75），请问是怎么回事，如何搞定呢？