除函数语句外，页面在try中无限加载

Question

在评论帖子的自动化过程中，我遇到了一个问题，一个函数有try-except语句。你可以通过阅读下面的代码来清楚地理解我的意思。

此方法编写评论并返回True或False

def write_review(browser,row):
    try:
    
        WebDriverWait(browser, 20).until(EC.presence_of_element_located((By.CSS_SELECTOR, 'label[for="rating-5"]'))).click()
    
        sleep(1)
        browser.find_element_by_id("review.userNickname").clear()
        browser.find_element_by_id("review.userNickname").send_keys(row['nickname'].replace(' ',''))
        sleep(1)
        browser.find_element_by_id("review.title").clear()
        browser.find_element_by_id("review.title").send_keys(row['headline'])
        sleep(1)
        browser.find_element_by_id("review.reviewText").clear()
        browser.find_element_by_id("review.reviewText").send_keys(row['review'])
        sleep(1)
        browser.find_element_by_css_selector('label[for="review.netPromoterScore.10"]').click()
        sleep(1)
    
        browser.find_element_by_css_selector('button[class*="js-preview"]').click()
        sleep(3)
    
        print('Submitting a review....') 
        WebDriverWait(browser, 20).until(EC.presence_of_element_located((By.CSS_SELECTOR, 'a[class*="js-submit"]'))).click()
        sleep(5)
        return True
    except Exception as ex::
        print(str(ex))
        return False

如果有任何评论没有成功发布，我实现了如下的函数调用

browser.get(url)
success = write_review(browser,row)
if success==False:
    while success!=True:
        browser.get(url)
        print('Again submitting...')
        success = write_review(browser,row)

但上述代码的问题是，在评论发布不成功的情况下，页面会一次又一次地加载，而没有在评论正文中输入任何数据。实际上，这个错误发生在print('Submitting a review....')语句之后的那一行，这意味着该行之前的click操作有时不能正确加载javascript。这就是为什么我在while循环之后再次使用相同函数调用语句加载页面。以下是一些错误消息

Continue to review posting....
Submitting a review....
Submitting a review....
Submitting a review....
Submitting a review....
Message: element not visible
  (Session info: chrome=89.0.4389.114)
  (Driver info: chromedriver=2.41.578700 (2f1ed5f9343c13f73144538f15c00b370eda6706),platform=Linux 5.8.0-49-generic x86_64)

Again submitting...
Message: unknown error: Element <label for="rating-5" class="">...</label> is not clickable at point (468, 17). Other element would receive the click: <input id="search-autocomplete" type="text" name="query" autocomplete="off" autocorrect="off" placeholder="Search food, toys, prescriptions and more" role="combobox" aria-controls="search__suggestions" aria-haspopup="listbox" aria-label="Search food, toys, prescriptions and more" class="sfw-search__input">
  (Session info: chrome=89.0.4389.114)
  (Driver info: chromedriver=2.41.578700 (2f1ed5f9343c13f73144538f15c00b370eda6706),platform=Linux 5.8.0-49-generic x86_64)

Again submitting...
Message: unknown error: Element <label for="rating-5" class="">...</label> is not clickable at point (468, 18). Other element would receive the click: <input id="search-autocomplete" type="text" name="query" autocomplete="off" autocorrect="off" placeholder="Search food, toys, prescriptions and more" role="combobox" aria-controls="search__suggestions" aria-haspopup="listbox" aria-label="Search food, toys, prescriptions and more" class="sfw-search__input">
  (Session info: chrome=89.0.4389.114)
  (Driver info: chromedriver=2.41.578700 (2f1ed5f9343c13f73144538f15c00b370eda6706),platform=Linux 5.8.0-49-generic x86_64)

Answer 1

将打印/日志放在带有异常信息消息的'except‘块中，并检查异常持续上升的原因。在不记录错误消息的情况下静音任何异常，特别是全局异常，这真的是个糟糕的主意。

示例：

    try:
        # Your code
    except Exception as ex:
        print(str(ex))
        return False

Answer 2

如果你想防止无限循环，你可以尝试这样做

browser.get(url)
success = write_review(browser,row)
if success==False:
    trytimes = 0
    maxtrytimes = 10
    while success!=True:
        browser.get(url)
        print('Again submitting...')
        success = write_review(browser,row)
        trytimes+=1
        if trytimes>maxtrytimes:
            print("write_review failed too many times")
            break

Answer 3

如果要单击按钮:导入：

from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By

添加等待：

wait = WebDriverWait(driver, timeout=30)
wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR, ".a[class="js-submit"]")))
list_view = driver.find_element_by_css_selector('a[class="js-submit"]')
list_view.click()

您正在使用presence_of_element_located，但它不会完全等待按钮。接下来，删除循环并删除睡眠。将所有睡眠替换为如上所述的显式等待，这将等待加载时间最长的元素。使用EC.visibility_of_element_located等待元素变为可见。

您正在对表单执行ddosing操作，因为某些定位器未完全加载或某些定位器不正确。在每次输入之前使用time.sleep(1)是一个非常糟糕的解决方案。最后，检查a[class="js-submit"]是否是唯一的。