Python Selenium-如何处理不'；在WebDriver完成之前不会出现吗？

目前，我正在尝试自动化订单流程，在某个时候，如果最近下了订单，将弹出一个警报，说明“客户已在2天内为这些相同的项目下了订单。请检查重复订单或检查覆盖重复订单以继续。”

我尝试了以下方法来拦截该警报并允许脚本继续运行：

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.ui import Select

from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.alert import Alert
from selenium.webdriver.support import expected_conditions as ExCon
from selenium.common.exceptions import TimeoutException, NoSuchElementException, NoAlertPresentException,\
     UnexpectedAlertPresentException

from oleaprocs import Order

"""
    Will put the following constants in their own file later
"""
GEN_NEXT_ID      = "cmdNext"

SHIP_DET_METH_ID = "cboAvailItemsShip"
SHIP_DET_NEXT_ID = "cmdNext"

ORDER_REP_ID     = "cboServiceRep"

EMAIL_ID         = "ctl00_ctl00_main_content_main_content_ctl00_txtEmail"
SEARCH_RESULT_ID = "ctl00_ctl00_main_content_main_content_ctl00_dgResults_ctl03_lnkCustName"
ADD_ORDER_ID     = "cmdAddNewOrder"

LOGIN_ID  = 'ctl00_ctl00_main_content_main_content_ctl00_UserName'
PASS_ID   = 'ctl00_ctl00_main_content_main_content_ctl00_password'
SIGNIN_ID = 'ctl00_ctl00_main_content_main_content_ctl00_SigninBtn'

PLACED_VIA  = 'Phone'
BILL_OPTION = 'Visa x1111'

username = 'user'
password = 'pass'

customer = 'user'
items    = {'Item1': '100', 'Item2': '125'} # One or many items - also noting quantity

# This setup will likely be steamlined to determine whose server to use, etc
driver = webdriver.Chrome()

driver.maximize_window()
driver.get("website-placeholder-for-security-reasons")

# Login will be separated out into a function, to allow for various logins
# log-in
driver.find_element_by_id(LOGIN_ID).send_keys(username)
driver.find_element_by_id(PASS_ID).send_keys(password)
driver.find_element_by_id(SIGNIN_ID).click()

driver.find_element_by_xpath('//a[text()="Customers"]').click()

# Type in search for user-email - separated to function later
search_email = driver.find_element_by_id(EMAIL_ID)
search_email.send_keys(customer)
search_email.send_keys(Keys.RETURN)

# Click the (hopefully) singular search result
driver.find_element_by_id(SEARCH_RESULT_ID).click()
#search_result = driver.find_element_by_id(SEARCH_RESULT_ID).click()
#search_result.click()

### Start creating new order ###

## Order Items ##

# Accept Customer Orders alert
"""
alert_obj = driver.switch_to.alert
alert_obj.accept()
"""
Alert(driver).accept()

# Click on "Add New Order"
driver.find_element_by_id(ADD_ORDER_ID).click()

order = Order(driver)

# Set Placed Via
placed_via = Select(driver.find_element_by_name('cboPlacedVia'))
placed_via.select_by_visible_text(PLACED_VIA) # could also set IDs in a dict

# Set Billing Option
bill_option = Select(driver.find_element_by_name('ctrlBillOption$cboBillOption'))
bill_option.select_by_visible_text(BILL_OPTION)

# Add items to order
order.add_items(items)

# Will likely do some assertions here at some point, for custom / printed items

driver.find_element_by_id('cmdNext').click()

## Shipping Details ##

# Select Shipping Method

# If similar order recently placed - confirm alert and try/except duplicate order override

# driver.implicitly_wait(2)

try:
    print("WebDriverWait - 2 seconds")
    WebDriverWait(driver, 2).until(ExCon.alert_is_present())
    Alert(driver).accept()
    print("Switching to Alert")
    #alert_dupe = driver.switch_to.alert
    # print(str(alert_dupe.text))
    # alert_dupe.accept()

except TimeoutException:
    print("Timeout")

except NoAlertPresentException:
    print("No Alert Present")

except UnexpectedAlertPresentException:
    print("Unexpected alert, yo!")

try:
    driver.find_element_by_id('chkDuplicateOrderOverride').click()

except NoSuchElementException:
    print("No duplicate order detected")


# Continue
driver.find_element_by_id('cmdNext').click()

## Order Group Details ##

# Check for Authorize button (I could bypass this when I implement "order_type" later
try:
    driver.find_element_by_id('cmdAuthorize').click()
except NoSuchElementException:
    print("No Authorize Element Found - This payment method does not require authorization")

driver.find_element_by_id('cmdPlaceOrder').click()

以及引用的另一个文件：

from selenium import webdriver
from selenium.webdriver.common.keys import Keys

"""
    Order will be used to keep track of the state of an order throughout
    the order-process. This can include things like the order total, items
    included, and can even get as complicated as 1:1 mirroring all of the
    details of an order. This will depend on our requirements.
"""
class Order(object):

    def __init__(self, driver):
        self.driver = driver

        # self.product_name_field = self.driver.find_element_by_id('txtProductName')
        # self.quantity_field = self.driver.find_element_by_id('txtQuantity')
        # self.add_item_button = self.driver.find_element_by_id('cmdAddSaveItem')


    # Add items to an order
    def add_items(self, items):
        """
            Will need to make the quantity check in here.
        """
        # product_name_field = self.driver.find_element_by_id('txtProductName')
        # quantity_field = self.driver.find_element_by_id('txtQuantity')
        # add_item_button = self.driver.find_element_by_id('cmdAddSaveItem')

        """
            Cannot simply one-time set the above because of the references
            going stale x_x - need to see if I can ignore stale-references.
        """
        for item, quantity in items.items():
            product_name_field = self.driver.find_element_by_id('txtProductName')
            product_name_field.send_keys(item)
            product_name_field.send_keys(Keys.TAB)

            quantity_field = self.driver.find_element_by_id('txtQuantity')
            quantity_field.send_keys(quantity)
            quantity_field.send_keys(Keys.TAB)

            add_item_button = self.driver.find_element_by_id('cmdAddSaveItem')
            add_item_button.click()

我对上一个可能不释放资源的警报发表了评论。。。我早一点就有以下代码来处理总是弹出的警报，所以我不必

尝试
那一个：

alert_obj = driver.switch_to.alert
alert_obj.accept()

我在这里使用了
driver.switch_to.alert
变体，因为我在前面的代码中尝试了这两种变体，但都不起作用

基本上，当代码到达
WebDriverWait（drive，2）
时会发生什么。。。浏览器在那里等待2秒钟，然后弹出警报。我已经尝试了各种任意长度的时间，它将始终等待该时间，然后显示警报。我觉得我在这里被人迷住了：|

以下是发生这种情况后我收到的错误信息：

Traceback (most recent call last):
  File "C:\Users\user\Documents\Projects\Selenium\proj.py", line 136, in <module>
    driver.find_element_by_id('cmdAuthorize').click()
  File "C:\Python\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 353, in find_element_by_id
    return self.find_element(by=By.ID, value=id_)
  File "C:\Python\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 957, in find_element
    'value': value})['value']
  File "C:\Python\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 314, in execute
    self.error_handler.check_response(response)
  File "C:\Python\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 241, in check_response
    raise exception_class(message, screen, stacktrace, alert_text)
selenium.common.exceptions.UnexpectedAlertPresentException: Alert Text: None
Message: unexpected alert open: {Alert text : Customer has placed an order for these same items within 2 days. Please check for duplicates or check Override Duplicate Order to continue.}
  (Session info: chrome=66.0.3359.181)
  (Driver info: chromedriver=2.38.552522 (437e6fbedfa8762dec75e2c5b3ddb86763dc9dcb),platform=Windows NT 10.0.16299 x86_64)

回溯（最近一次呼叫最后一次）：
文件“C:\Users\user\Documents\Projects\Selenium\proj.py”，第136行，在
驱动程序。按\u id（'cmdAuthorize'）查找\u元素。单击（）
文件“C:\Python\lib\site packages\selenium\webdriver\remote\webdriver.py”，第353行，按id查找元素
返回self.find_元素（by=by.ID，value=ID_u）
文件“C:\Python\lib\site packages\selenium\webdriver\remote\webdriver.py”，第957行，位于find\u元素中
'value'：value}）['value']
文件“C:\Python\lib\site packages\selenium\webdriver\remote\webdriver.py”，第314行，在execute中
self.error\u handler.check\u响应（响应）
文件“C:\Python\lib\site packages\selenium\webdriver\remote\errorhandler.py”，第241行，在check\u响应中
引发异常类（消息、屏幕、堆栈跟踪、警报文本）
selenium.common.exceptions.UnexpectedAlertPresentException:警报文本：无
消息：意外警报打开：{警报文本：客户已在2天内为这些相同的项目下了订单。请检查重复项或检查覆盖重复订单以继续。}
（会话信息：chrome=66.0.3359.181）
（驱动程序信息：chromedriver=2.38.552522（437e6fbedfa8762dec75e2c5b3ddb86763dc9dcb），平台=Windows NT 10.0.16299 x8664）

知道为什么会发生这种情况吗？如果我没记错的话，我不相信我们真的有任何警报也有复选框或输入，所以我不会100%反对100%阻止Selenium确认警报（或自动接受警报），但如果可以的话，我希望避免这种情况

如果最近没有下订单（或者我使用不同的帐户在over and over下测试订单的创建），代码运行完全正常，并且一直正确地下订单

从添加项目（就在问题页面之前）开始的手动步骤是：

1） 输入项目名称，然后输入项目数量
2） 对“项目”目录中的每个项目执行此操作
3） 点击下一个按钮
4） 下一页带有装运选项“装载”
5） 如果最近下了订单，则会出现问题—WebDriverWait似乎正在停止加载页面？看起来是这样的，因为在WebDriverWait时间用完之前，警报不会显示

在告诉Selenium点击下一步按钮进入下一页后，我并没有做任何特别的事情。与之前的“点击下一步按钮”操作没有什么不同，页面的行为也不应该与其他页面有任何不同——尽管警报显然没有显示“点击下一步按钮”在警报检查之前——在我尝试先提交装运详细信息之后，警报才会弹出。警报检查失败后似乎继续执行进一步步骤的原因

孩子们，事先概述一下这个过程。
你们的代码是驱动程序。按id（“CHKDupplicateOrderOverride”）查找元素。单击（）
，但回溯说是驱动程序。按id（“cmdAuthorize”）查找元素。单击（）

。。。我遗漏了什么吗？对吗？太奇怪了。所以很明显它。。。只是跳过一堆东西，继续下一段代码，我也不知道为什么会发生这种情况。但它肯定会到此为止，因为在“cmdAuthorize”阶段，我们已经进入下一页，所以它自然会尝试引用一些不存在的内容。由于“自我注释”等原因，目前有点混乱，但如果你认为这会有帮助，我可以发布所有代码。我认为太多的

try{}

和

catch{}

行为不端。你能用更多的用例（手动步骤）和代码尝试更新这个问题吗？用完整的代码更新&对过程中的手动步骤进行一些解释。有点（我认为）简单，但我们在这里…感谢分享详细的解决方案