Python爬取百度首页logo

#!/usr/bin/env python
# coding: utf-8
## 爬虫实战1——爬取百度logo

import os
import requests
import bs4

url = 'https://www.baidu.com/'
r = requests.get(url)
r.encoding = 'utf-8'
r.text

soup = bs4.BeautifulSoup(r.text)
print(soup.prettify())

img = soup.select('#lg img')
if img == []:
    print('找不到图片！')
else:
    imgUrl ='https:' + img[0].get('src')
    print('开始下载···')
    res = requests.get(imgUrl)

os.makedirs('baidu', exist_ok=True)
imageFile = open(os.path.join('baidu', os.path.basename(imgUrl)), 'wb')

for chunk in res.iter_content(100000):
    imageFile .write(chunk)

imageFile.close()
print('下载完成！')