如何通过Python使用ChromeDriver Chrome和Selenium打印页面上的分类链接?

2024-03-28 22:08:52 发布

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使用Python3,我试图让chromewebdriver和Selenium识别网页上的各种“分类广告”类别www.jtinsight.com从那里打印出分类标题。到目前为止,使用下面的代码,我能做的就是让它打印出前两个-'所有类别'和'汽车(私人)'。我已经确定了这两个的html与其他的不同,并且尝试了许多不同的代码行,我已经在注释掉的代码中列出了这些代码行,但是无法确定正确的标记/类/xpath等等。 任何帮助都将不胜感激。你知道吗

from selenium import webdriver
from selenium.webdriver.common.by import By

# Creating the WebDriver object using the ChromeDriver
driver = webdriver.Chrome()

# Directing the driver to the defined url
driver.get("https://www.jtinsight.com/JTIRA/JTIRA.aspx#!/main")

# Locate the categories

# Each code line runs but only returns the first two categories
# categories = driver.find_elements_by_xpath('//div[@class="col-md-3 col-sm-4 col-xs-6"]')
# categories = driver.find_elements_by_xpath('//div[@class="mainCatEntry"]')
# categories = driver.find_elements_by_xpath('//div[@class="Description"]')

# Process ran but finished with exit code 0
# categories = driver.find_elements_by_xpath('//*[@class="col-md-3 col-sm-4 col-xs-6 ng-scope"]')
# categories = driver.find_elements_by_xpath('//div[@class="col-md-3 col-sm-4 col-xs-6 ng-scope"]')
# categories = driver.find_elements_by_partial_link_text('//href[@class="divLink"]')
# categories = driver.find_elements_by_tag_name('bindonce')
# categories = driver.find_elements_by_xpath('//div[@class="divLink"]')

# Error before finished running
# categories = driver.find_elements(By.CLASS_NAME, "col-md-3 col-sm-4 col-xs-6 ng-scope")
# categories = driver.find_elements(By.XPATH, '//div bindonce[@class="col-md-3 col-sm-4 col-xs-6 ng-scope"]')
# categories = driver.find_elements_by_class_name('//div bindonce[@class="col-md-3 col-sm-4 col-xs-6 ng-scope"]')

# Print out all categories on current page
num_page_items = len(categories)
print(num_page_items)
for i in range(num_page_items):
    print(categories[i].text)

# Clean up (close browser once task is completed.)
driver.close()

Tags: thedivbydrivercolelementsfindng
2条回答

要识别网页https://www.jtinsight.com/JTIRA/JTIRA.aspx#!/main上的各种分类广告类别并打印类别标题,例如所有类别汽车(私人)等,您需要向下滚动并归纳visibility_of_all_elements_located()WebDriverWait,您可以使用以下解决方案:

  • 代码块:

    from selenium import webdriver
    from selenium.webdriver.common.by import By
    from selenium.webdriver.support.ui import WebDriverWait
    from selenium.webdriver.support import expected_conditions as EC
    
    options = webdriver.ChromeOptions() 
    options.add_argument("start-maximized")
    options.add_argument('disable-infobars')
    driver=webdriver.Chrome(chrome_options=options, executable_path=r'C:\Utility\BrowserDrivers\chromedriver.exe')
    driver.get("https://www.jtinsight.com/JTIRA/JTIRA.aspx#!/main")
    driver.execute_script("arguments[0].scrollIntoView(true);",WebDriverWait(driver, 30).until(EC.visibility_of_element_located((By.XPATH, "//span[@class='ng-scope' and text()='Classifieds']"))));
    print([elem.get_attribute("innerHTML") for elem in WebDriverWait(driver, 30).until(EC.visibility_of_all_elements_located((By.XPATH, "//div[@class='mainCatEntry']//div[@class='Description']")))])
    

这确实是个时间问题。如果我在收集分类之前加上一个“sleep(5)”,它会找到全部24个。有趣的是,当我改用WebDriverWait时,它仍然只能显示2个项目。因此,为了迫使驱动程序做更多的工作,我扩展了xpath。以下几点对我有用:

categories = WebDriverWait(driver, 10).until(
EC.visibility_of_all_elements_located((By.XPATH, '//div[@class="mainCatEntry"]/div[@class="Description"]')))

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