如果硒无法找到元素，如何无效关闭硒

Question

如果元素不存在，我试图返回false，但是如果元素不存在，我不想结束程序。我的问题是，当Selenium找不到元素时，它会关闭所有元素，但我不想关闭它，我想运行其余的代码。可能吗？

我的Python代码：

if driver.find_element_by_xpath("//a[@class='btn btn-primary im_edit_forward_btn disabled']") != 0 :     
    print("Break here")
    return False

print("Running the rest")
encaminhar = driver.find_element_by_xpath("//a[@class='btn btn-primary im_edit_forward_btn']")
encaminhar.click()

输出：

Traceback (most recent call last):
  File "webscraping.py", line 94, in <module>
    if forwardMessages():
  File "webscraping.py", line 57, in forwardMessages
    if driver.find_element_by_xpath("//a[@class='btn btn-primary im_edit_forward_btn disabled']") != 0 :
  File "C:\Users\gusta\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\selenium\webdriver\remote\webdriver.py", line 394, in find_element_by_xpath
    return self.find_element(by=By.XPATH, value=xpath)
  File "C:\Users\gusta\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\selenium\webdriver\remote\webdriver.py", line 976, in find_element
    return self.execute(Command.FIND_ELEMENT, {
  File "C:\Users\gusta\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\selenium\webdriver\remote\webdriver.py", line 321, in execute
    self.error_handler.check_response(response)
  File "C:\Users\gusta\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.NoSuchElementException: Message: no such element: Unable to locate element: {"method":"xpath","selector":"//a[@class='btn btn-primary im_edit_forward_btn disabled']"}

Answer 1

您可以捕获异常。

from selenium.common.exception import NoSuchElementException

try:
    driver.find_element_by_xpath("//a[@class='btn btn-primary im_edit_forward_btn disabled']")
except NoSuchElementException:
    pass

Answer 2

解决了我的NoSuchElementException以外的问题。您必须添加from selenium.common.exceptions import NoSuchElementException

我的Python代码：

try:
    if driver.find_element_by_xpath("//a[@class='btn btn-primary im_edit_forward_btn disabled']") != 0 :     
        print("0 new messages")
        return False

except NoSuchElementException:
    print("New messages found")

encaminhar = driver.find_element_by_xpath("//a[@class='btn btn-primary im_edit_forward_btn']")
encaminhar.click()