selenium访问百度 然后获取百度logo的截图

#!/usr/bin/env python  
# encoding: utf-8
import time
from selenium import webdriver
from PIL import Image
from io import BytesIO
driver=webdriver.Chrome()
driver.get("http://www.baidu.com/")
img=driver.find_element_by_xpath("//div/img")
location=img.location
size=img.size
x=location["x"]
y=location["y"]
height=size["height"]
wid=size["width"]
im=Image.open(BytesIO(driver.get_screenshot_as_png()))
im.show()
box=(x,y,x+wid,y+height) #这四个参数表示要截取的坐标 左上角的x,y右下角的x,y
captcha=im.crop(box)  #截取上面指定的区域
captcha.show()