python 中selenium的等待机制不起作用

issue_table = driver.find_element_by_id("issuetable")
    WebDriverWait(driver, 240).until(
        lambda x: len(x.find_element_by_id("issuetable").find_elements_by_tag_name('tr')) >=10)
    rows = issue_table.find_elements_by_tag_name("tr")
    for index, row in enumerate(rows):
        if index == 0:
            pass
        else:
            WebDriverWait(driver, 60).until(
                lambda x: len(x.find_elements_by_tag_name('td'))>6)
            cols = row.find_elements_by_tag_name("td")
            print(cols[1].text)

这段代码中的等待机制完全不起作用

http://blog.csdn.net/huilan_same/article/details/52544521

我也遇到了，楼主解决了没