傻瓜版代码，先修改储存目录和webdriver路径，再输入网址和图片数量就能用了。
from selenium import webdriver
import time
from lxml import etree
import random
from urllib import request
import os
def pic_url_get(num):
for i in range(num):
time.sleep(random.uniform(0,2))
content = driver.page_source
html = etree.HTML(content)
pic_url = html.xpath('/*;q=0.8,application/signed-exchange;v=b3;q=0.9')]
request.install_opener(opener)
name = os.path.split(pic_url)[-1]
if '.' not in name:
name = name + '.jpg'
try:
request.urlretrieve(pic_url, r'C:UsersmsiDesktopgoogle{0}'.format(name))
print(name + '下载完成！！！')
except:
request.urlretrieve(pic_url, r'C:UsersmsiDesktopgoogle{0}.jpg'.format(a))
print(str(a) + '下载完成！！！')
a+=1
if __name__ =='__main__':
if os.path.isdir(r'C:UsersmsiDesktopGoogle'): #修改成你想要存储到的地方
pass
else:
os.mkdir(r'C:UsersmsiDesktopGoogle') #修改成你想要存储到的地方
num = int(input('请输入你想要下载的图片数量(整数)：'))
pic_urls = []
url = input('请输入你想要下载的谷歌图片网址：')
driver_path = r'G:Pythonchromedriver' #修改成你的chromedriver的路径
driver = webdriver.Chrome(executable_path=driver_path)
driver.get(url)
first_pic_button = driver.find_element_by_xpath('//div[@id="islrg"]/div[1]/div[1]/a[1]')
first_pic_button.click()
pic_url_get(num)
print(pic_urls)
pics_download()
print('-----------------------------------爬取完成------------------------------------------')
