from selenium import webdriver
driver = webdriver.Chrome("./chromedriver")
driver.get('https://www.google.com/search?q=dog&tbm=isch&hl=ko&hl=ko&tbs=sur%3Afc&ved=0CAIQpwVqFwoTCIj067ng1ecCFQAAAAAdAAAAABAC&biw=1368&bih=771')
#
# driver.find_element_by_xpath('//*[@id="islrg"]/div[1]/div[1]/a[1]/div[1]/img').screenshot('1.png')
# driver.find_element_by_xpath('//*[@id="islrg"]/div[1]/div[2]/a[1]/div[1]/img').screenshot('2.png')
# driver.find_element_by_xpath('//*[@id="islrg"]/div[1]/div[3]/a[1]/div[1]/img').screenshot('3.png')
# i = 1,2,3
for i in range(1,20) :
driver.find_element_by_xpath('//*[@id="islrg"]/div[1]/div['+ str(i) +']/a[1]/div[1]/img').screenshot(str(i) + '.png')