这是我的代码:
def CheckQueue(driver):
qdone = False
qID_xpath_start = "/html/body/div[5]/form/table/tbody[1]/tr["
qID_xpath_end = "]/td[2]/a"
qIDindex = 1
while qdone == False:
print "enter loop"
print driver.find_element_by_xpath(qID_xpath_start+str(qIDindex)+qID_xpath_end).text #This prints
try:
element = WebDriverWait(driver, 6000).until(ec.presence_of_element_located(By.XPATH((qID_xpath_start+str(qIDindex)+qID_xpath_end)))) #This fails
print "found"
except:
qdone= True
print "could not be found"
print driver.find_element_by_xpath(qID_xpath_start+str(qIDindex)+qID_xpath_end).text
if qdone == False:
print driver.find_element_by_xpath(qID_xpath_start+str(qIDindex)+qID_xpath_end).text
print "testing"
qIDindex +=1
print "loop"
return driver
我得到这个返回(14453 是我正在寻找的 xpath 的链接文本)
enter loop
14453
could not be found
14453
loop
看起来我的代码能够找到链接,但是当要求检查链接是否存在时,它失败了,并激活了 except 语句。如果已经找到并打印出来,为什么会失败?
此外,它几乎立即失败,即使我已经分配了很多时间来查看它。
知道我哪里出错了吗?
我试过了
element = WebDriverWait(driver, 6000).until(ec.presence_of_element_located(By.XPATH((qID_xpath_start+str(qIDindex)+qID_xpath_end))))
element = WebDriverWait(driver, 6000).until(EC.presence_of_element_located(By.XPATH((qID_xpath_start+str(qIDindex)+qID_xpath_end))))
element = WebDriverWait(driver, 6000).until(ec.presence_of_element_located(By.XPATH, qID_xpath_start+str(qIDindex)+qID_xpath_end))
element = WebDriverWait(driver, 6000).until(ec.presence_of_element_located(By.xpath, qID_xpath_start+str(qIDindex)+qID_xpath_end))
我正在使用 Python 2.7、Selenium 2.43、Firefox 23.0.3
顺便说一下,为了测试是否可以在某些点找到该 xpath 元素,我加入了几个可能感觉不合适的打印语句。
编辑:当我删除 try 语句时,出现此错误。
element = WebDriverWait(driver, 6000).until(EC.presence_of_element_located(By.XPATH((qID_xpath_start+str(qIDindex)+qID_xpath_end))))
NameError: 全局名称 'By' 未定义
我的代码中有以下导入语句:
from selenium import webdriver
from selenium.common.exceptions import TimeoutException
from selenium.webdriver.support.ui import WebDriverWait # available since 2.4.0
from selenium.webdriver.support import expected_conditions as EC # available since 2.26.0
from selenium.webdriver.support.ui import Select
from selenium.webdriver.common.action_chains import ActionChains
我想我确实需要添加一个导入语句,但我似乎找不到如何导入该语句。
我试过:
from selenium.webdriver.common.by import By
当我运行它时,我克服了那个错误但收到了这个错误:
element = WebDriverWait(driver, 6000).until(EC.presence_of_element_located(By.XPATH((qID_xpath_start+str(qIDindex)+qID_xpath_end)))) TypeError: 'str' object is not callable
然后我更新了 WebDriverWait 行以反射(reflect) alecxe 的建议。
element = WebDriverWait(driver, 6000).until(EC.presence_of_element_located((By.XPATH, qID_xpath_start+str(qIDindex)+qID_xpath_end)))
现在它似乎正在工作。
最佳答案
WebDriverWait
expression syntax不正确,应该是:
WebDriverWait(driver, 60).until(ec.presence_of_element_located((By.XPATH, qID_xpath_start+str(qIDindex)+qID_xpath_end)))
注意传入 presence_of_element_located()
方法的元组。
请注意,60
在这里是 60 秒。
此外,为了成功调试和理解正在发生的事情,让它失败通常会有所帮助 - 删除 try/except
并查看引发了什么样的错误。
关于python - 即使存在元素,WebdriverWait 也会失败,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/26267565/