Question

我正在抓取网址

https://www.youtube.com/trendsdashboard#loc0=ind

以上工作正常，但在同一页面上有多个链接，即：

https://www.youtube.com/trendsdashboard#loc0=ind&feed=shared

它给出了一个空结果。它是相同的：

https://www.youtube.com/trendsdashboard#loc0=ind&feed=shared&gen0=male https://www.youtube.com/trendsdashboard#loc0=ind&feed=shared&gen0=female。

def getVideoTrend(self):
    binary = FirefoxBinary('/usr/bin/firefox')
    driver = webdriver.Firefox(firefox_binary=binary)
    driver.get("https://www.youtube.com/trendsdashboard#loc0=ind&feed=shared")
    assert "YouTube Trends" in driver.title
    video_trend = []
    for s in driver.find_elements_by_class_name('video-item'):
        print s
        video = {}
        videourl = s.find_element_by_css_selector('a').get_attribute('href')
        video['url'] = videourl
        videotitle = s.find_element_by_css_selector('a').get_attribute('alt')
        video['title'] = videotitle
        video_trend.append(video)
    print video_trend

Answer 1

问题可能在于您没有等待在DOM中加载元素。

尝试做类似的事情：

导入selenium webdriverwait

from selenium.webdriver.support.ui import WebDriverWait

在获取元素之前等待元素加载。

elements = WebDriverWait(driver, 10).until(lambda driver: driver.find_elements_by_class_name('video-item'))                                   
for s in elements:
    print s.text
    video = {}
    videourl = s.find_element_by_css_selector('a').get_attribute('href')
    video['url'] = videourl
    videotitle = s.find_element_by_css_selector('a').get_attribute('alt')
    video['title'] = videotitle
    video_trend.append(video)
print video_trend

此代码适用于我

driver = webdriver.Firefox()

class Test(object):
    url1 = "https://www.youtube.com/trendsdashboard#loc0=ind"
    url2 = "https://www.youtube.com/trendsdashboard#loc0=ind&feed=shared"
    url3 = "https://www.youtube.com/trendsdashboard#loc0=ind&feed=shared&gen0=male"

def get_video_trend(url):
    driver.get(url)
    assert "YouTube Trends" in driver.title
    video_trend = []
    element = WebDriverWait(driver, 10).until(lambda driver: driver.find_elements_by_class_name('video-item'))                                   
    for s in element:
        print (s.text)
        video = {}
        videourl = s.find_element_by_css_selector('a').get_attribute('href')
        video['url'] = videourl
        videotitle = s.find_element_by_css_selector('a').get_attribute('alt')
        video['title'] = videotitle
        video_trend.append(video)
    print (video_trend)

if __name__ == '__main__':
    get_video_trend(Test.url1)
    get_video_trend(Test.url2)
    get_video_trend(Test.url3)

硒不适用于＆amp;在网址中

1 个答案: