python - 如何使用 Selenium 和 Python 从链接中提取动态图像？

Question

我正在尝试从链接下载图像。既然是动态渲染图，请问如何下载呢？

现在我试图获取图像 URL，但这是渲染图像我能够获取第一个链接。

代码如下:

from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.support.ui import Select
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.common.exceptions import TimeoutException

executable_path = "/usr/bin/chromedriver"
chrome_options = Options()
os.environ["webdriver.chrome.driver"] = executable_path
driver = webdriver.Chrome(executable_path=executable_path, chrome_options=chrome_options)
driver.get("https://www.macfarlanepartners.com/projects/park-fifth-mid-rise/")
driver.maximize_window()
print "Entered"
elements = driver.find_elements_by_xpath("""/html/body/div/div/div[3]/div[1]/div[1]""")
time.sleep(5)
for i in  elements:
    image = i.find_element_by_tag_name("img")
    img_src = image.get_attribute("src")
    print img_src

driver.close()

输出

我只得到第一张图片链接:

https://www.macfarlanepartners.com/wp-content/uploads/2016/08/Park-Fifth-Mid-Rise-Large-Photo-1-480x240.jpg

还有没有办法自动找到src和img标签来下载图片，而不是根据不同的网站搜索xpath？

Answer 1

您只能检索第一个链接作为您的定位器策略 find_elements_by_xpath("""/html/body/div/div/div[3]/div[1]/div[1]""")只返回一个元素，这就是为什么 for()循环仅迭代一次以提取 src 的值第一个的属性 <img>标签。

更好的解决方案是包含 <img> xpath 中的标签如下:

elements = driver.find_elements_by_xpath("""/html/body/div/div/div[3]/div[1]/div[1]/img""")
for i in  elements:
    img_src = i.get_attribute("src")
    print img_src

您将能够检索 3 个链接，如下所示:

https://www.macfarlanepartners.com/wp-content/uploads/2016/08/Park-Fifth-Mid-Rise-Large-Photo-1-480x240.jpg
https://www.macfarlanepartners.com/wp-content/uploads/2016/08/Park-Fifth-Mid-Rise-Large-Photo-2-480x240.jpg
https://www.macfarlanepartners.com/wp-content/uploads/2016/08/Park-Fifth-Mid-Rise-Large-Photo-3-1-480x240.jpg