原理：
1.截图(整个窗口)
2.获取此元素坐标
element = driver.find_element_by_id("xx")
element.location)
3.获取此元素大小
element = driver.find_element_by_id("xx")
element.size
4.根据元素坐标和元素大小确定此元素四个角坐标
5.依赖pillow，根据四角坐标提取图片并保存
案例源码：
首先pip安装pillow
pip install pillow
截图：
# coding:utf-8 from selenium import webdriver from PIL import Image driver = webdriver.Firefox() driver.get('http://www.baidu.com/') driver.save_screenshot('bdbutton.png') element = driver.find_element_by_id("su") print(element.location) # 打印元素坐标 print(element.size) # 打印元素大小 left = element.location['x'] top = element.location['y'] right = element.location['x'] + element.size['width'] bottom = element.location['y'] + element.size['height'] im = Image.open('bdbutton.png') im = im.crop((left, top, right, bottom)) im.save('bdbutton.png')
注：转载需注明出处及作者。
