Question

我是python的新手，但需要修改其他人创建的代码。我无法发布完整的代码，但我在下面发布了大部分代码：

from bs4 import BeautifulSoup
import datetime
import getpass
from gmail import Gmail
from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException
from selenium.common.exceptions import ElementNotVisibleException
from time import sleep
from selenium.common.exceptions import NoAlertPresentException
from selenium.webdriver.support import expected_conditions as EC


def soupify(session, url):
    """
    Makes parse-able HTML from any given URL.
    :param session: requests.Session()
    :param url: str
    :return: BeautifulSoup object
    """
    while True:
        try:
            r = session.get(url)
            break
        except Exception as e:
            print(e)
    return BeautifulSoup(r.content, 'html.parser')


def create_http_session():
    """
    Quick little function for returning a requests.Session() instance
    with a properly set User-Agent header.
    :return: requests.Session()
    """
    session = requests.Session()
    session.headers.update({'User-Agent':
                            'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36'
                        })
    return session


def retrieve_hidden_input(soup, name):
    return soup.find('input', attrs={
        'type': 'hidden',
        'name': name
    }).get('value')

class AmericanHomesScraper:
    def __init__(self, username, password, testing):
        self.username = username
        self.password = password
        self.testing = testing
        self.chrome_session = webdriver.PhantomJS()
        self.chrome_session.maximize_window()
        self.g = Gmail()
        self.g.login(username, password)
        self.index = 0

    def check_for_new_emails_from_sender(self,
                                     sender='info@mailer.netflix.com'):
        self.index += 1
        if self.index % 1000 == 0:
            print('Checking emails - {0}.'.format(datetime.datetime.now()))
        elif self.index == 1:
            print('Checking emails - {0}.'.format(datetime.datetime.now()))
        else:
            pass
        for s in sender:
            messages = self.g.inbox().mail(sender=s,
                                       unread=True)
            for message in messages:
                message.read()
                print(
                'Email from {0}: {1}.'.format(s, datetime.datetime.now()))
                self.check_for_listings()
            self.g.logout()
            self.g = Gmail()
            self.g.login(self.username, self.password)

 def login(self, username, ahsPassword):
    self.ahsPassword = ahsPassword
    self.chrome_session.get('https://www.aaa.com/Login.aspx')
    self.chrome_session.find_element_by_xpath(
        '//*[@id="txtUsername"]'
    ).send_keys(username)
    self.chrome_session.find_element_by_xpath(
        '//*[@id="txtPassword"]'
    ).send_keys(ahsPassword)
    self.chrome_session.find_element_by_xpath(
        '//*[@id="btnSubmit"]'
    ).click()

 def check_for_listings(self):
    #code block
    links = self.chrome_session.find_elements_by_class_name('link-record')
    links = [(link.text, link.get_attribute('href').decode('utf-8'))
             for link in links]
    if len(links) == 0:
        print("No work orders available at {0}".format(
            datetime.datetime.now())
        )
    else:
        for link_text, link_url in links:
            print("Clicking work order {0} at {1}".format(link_text,datetime.datetime.now()))
            self.chrome_session.get(link_url)
            print("Attempting to accept at {0}".format(datetime.datetime.now()))
            try:
                self.chrome_session.find_element_by_xpath("//input[@value='Accept']").click()
                try:
                    WebDriverWait(self.chrome_session, 1).until(EC.alert_is_present)
                    self.chrome_session.switch_to().alert().accept()
                    print("Accepted work order {0} at {1}.".format(link_text,datetime.datetime.now()))
                except:
                    print "no alert"
            except ElementNotVisibleException:
                print("Accept input not found at {0}".format(datetime.datetime.now()))
            self.chrome_session.back()

def main():
    username = raw_input(
        'Please enter the username of the GMail account you want to monitor.\n>')
    password = getpass.getpass(
        'Please enter the password of the GMail account you want to monitor.\n>')
    ahsPassword = getpass.getpass('Please enter the password for ahs. \n>')
    ahs = AmericanHomesScraper(username, password, testing)
    ahs.login(username,ahsPassword)
    print("Starting script")
    while True:
        ahs.check_for_new_emails_from_sender([
            'crm@aaa.com',
            'ds@aaa.com',
        ])


if __name__ == '__main__':
    main()

这正确地找到并单击“接受”输入按钮。单击“接受”后，将打开javascript警报（“确定/取消”）以确认接受。但是，脚本找不到生成的警报。或者，至少它无法接受它，因为调用了异常。

正如您所看到的，我试图switch_to().alert()，但这不起作用。

我做错了什么？非常感谢你的帮助，我一直在努力工作几个小时。

更新

此代码在虚拟服务器上运行，不使用UI。我刚才意识到驱动程序是PhantomJS，而不是Chrome。所以，这可能是它失败的原因。我已更新问题以反映这一点。

我尝试过类似问题的建议，但是没有用。第三方网站需要警报确认才能完成此过程，但我的脚本无法看到它，因为它无头。

Answer 1

这里有几点：

switch_to_alert 已被弃用，因此我们必须强制使用 switch_to().alert()
在我看来是一个纯粹的时间问题。因此，我们需要将 ExplicitWait ， WebDriverWait 与 expected_conditions 子句设置为 { {1}} 如下：
```
alert_is_present
```

Answer 2

我不知道下面的代码是否会对你有所帮助，有一次我面临同样的问题并最终等待警报然后接受警报，为我工作。

from selenium.common.exceptions import NoAlertPresentException,

   def wait_for_alert(self):

        for i in range(50):
            try:
                alert = chrome_session.switch_to.alert
                if alert.text:
                   break
            except NoAlertPresentException:
              pass
            time.sleep(.25)
        else:
            raise NoAlertPresentException("Alert visibility timed out")
    return alert

wait_for_alert().accept()

Answer 3

尝试下面的代码！为我工作正常！

alert = driver.switch_to.alert #This .alert will work For Python
try:
   alert.accept() #If you want to Accept the Alert
except:
   alert.dismiss()  #If  You want to Dismiss the Alert.

警告

3 个答案: