使用Python和Selenium下载 Google 图像

在本文中，我们将看到如何使用Python和Selenium下载 google Image。

安装

在 PC 的终端上，键入以下命令。

pip install selenium

我们还需要安装一个网络驱动程序，以帮助我们自动运行网络浏览器。您可以安装 Firefox 网络驱动程序、Internet Explorer 网络驱动程序或 Chrome 网络驱动程序。在本文中，我们将使用 Chrome Web Driver。

自动化脚本通过查找我们指定的元素与网页交互。有多种方法可以在网页中查找元素。最简单的方法是选择所需元素的 HTML 标记并复制其 XPath。为此，只需右键单击网页，单击“检查”，然后复制所需元素的 XPath。如果需要，您还可以使用元素的名称或 CSS。

Google 图片结果的 HTML

下面是实现：

Python3

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
import time
  
# What you enter here will be searched for in
# Google Images
query = "dogs"
  
# Creating a webdriver instance
driver = webdriver.Chrome('Enter-Location-Of-Your-Webdriver')
  
# Maximize the screen
driver.maximize_window()
  
# Open Google Images in the browser
driver.get('https://images.google.com/')
  
# Finding the search box
box = driver.find_element_by_xpath('//*[@id="sbtc"]/div/div[2]/input')
  
# Type the search query in the search box
box.send_keys(query)
  
# Pressing enter
box.send_keys(Keys.ENTER)
  
# Fumction for scrolling to the bottom of Google
# Images results
def scroll_to_bottom():
  
    last_height = driver.execute_script('\
    return document.body.scrollHeight')
  
    while True:
        driver.execute_script('\
        window.scrollTo(0,document.body.scrollHeight)')
  
        # waiting for the results to load
        # Increase the sleep time if your internet is slow
        time.sleep(3)
  
        new_height = driver.execute_script('\
        return document.body.scrollHeight')
  
        # click on "Show more results" (if exists)
        try:
            driver.find_element_by_css_selector(".YstHxe input").click()
  
            # waiting for the results to load
            # Increase the sleep time if your internet is slow
            time.sleep(3)
  
        except:
            pass
  
        # checking if we have reached the bottom of the page
        if new_height == last_height:
            break
  
        last_height = new_height
  
  
# Calling the function
  
# NOTE: If you only want to capture a few images,
# there is no need to use the scroll_to_bottom() function.
scroll_to_bottom()
  
  
# Loop to capture and save each image
for i in range(1, 50):
    
    # range(1, 50) will capture images 1 to 49 of the search results
    # You can change the range as per your need.
    try:
  
      # XPath of each image
        img = driver.find_element_by_xpath(
            '//*[@id="islrg"]/div[1]/div[' +
          str(i) + ']/a[1]/div[1]/img')
  
        # Enter the location of folder in which
        # the images will be saved
        img.screenshot('Download-Location' +  
                       query + ' (' + str(i) + ').png')
        # Each new screenshot will automatically
        # have its name updated
  
        # Just to avoid unwanted errors
        time.sleep(0.2)
  
    except:
          
        # if we can't find the XPath of an image,
        # we skip to the next image
        continue
  
# Finally, we close the driver
driver.close()

结果：

捕获的图像

嗯，这是创建自动化脚本的最简单方法。这个小程序可以成为你有趣的小项目。这可能是您使用Selenium旅程的起点。您可以使用Selenium执行不同的操作，例如从 Google 新闻中抓取新闻。因此，请保持对新想法的开放态度，您最终可能会使用Selenium和Python创建一个伟大的项目。