How to implement selenium screenshot in python

You can use the virtual screen method to run the browser on the virtual screen and take screenshots, so that it will not affect the display of the current screen.

For specific implementation, you can use Xvfb and pyvirtualdisplay libraries. Xvfb is a virtual X11 server that creates a virtual screen in memory, and pyvirtualdisplay is a Python library that enables starting and controlling Xvfb from Python code.

pyvirtualdisplay

The following is an example:

from pyvirtualdisplay import Display
from selenium import webdriver

# 启动虚拟屏幕
display = Display(visible=0, size=(800, 600))
display.start()

# 创建浏览器实例并访问页面
browser = webdriver.Chrome()
browser.get('https://www.google.com')

# 截图并保存
browser.save_screenshot('screenshot.png')

# 关闭浏览器和虚拟屏幕
browser.quit()
display.stop()

In this example, we first start the virtual screen, then create a Chrome browser instance and visit the Google homepage . Then we use the save_screenshot method to take a screenshot of the page and save it to a local file. Finally we closed the browser and virtual screen.

Please note that the size of the virtual screen should be the same as the browser window size, otherwise the screenshot may be incomplete. In the code, we specify the size of the virtual screen as 800x600, which you can modify according to the actual situation.

Q&A

If you have too many tasks, you need to activate many virtual screens. Will this consume a lot of memory?

Yes, opening multiple virtual screens will occupy a lot of memory.

Xvfb

You can consider using Xvfb (virtual X11 window system) to simulate the screen, so that the page will not pop up when taking screenshots. The following is an example of Xvfb screenshot code based on Python:

import os
import time
from selenium import webdriver
from pyvirtualdisplay import Display
from PIL import Image

# 设置虚拟屏幕分辨率
display = Display(visible=0, size=(1920, 1080))
display.start()

# 启动浏览器
browser = webdriver.Chrome()

# 打开网页
browser.get('https://www.baidu.com')

# 等待页面加载完成
time.sleep(5)

# 截图
browser.save_screenshot('screenshot.png')

# 退出浏览器
browser.quit()

# 关闭虚拟屏幕
display.stop()

# 打开截图
Image.open('screenshot.png').show()

In this example, we use the pyvirtualdisplay library to create a virtual screen, the Chrome browser and Selenium to open web pages and screenshots, and finally use the Pillow library to open screenshots. Note that this method needs to be run in a Linux or macOS environment.

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