python代码段：
1、requests爬取图片
import requests
url = 'https://www.baidu.com/img/bd_logo1.png'
data = requests.get(url).content
with open('baidu.png', 'wb') as fb:
fb.write(data)2、uuid
from uuid import uuid4 print(uuid4()) # 253b0bda-7f3e-4eeb-9116-b8b4865083b6
3、获取cpu 内存的使用率
import psutil import os print(os.getpid()) print(psutil.virtual_memory().percent) print(psutil.cpu_percent(interval=1.0)) # 40462 # 67.2 # 7.1
4、字典转json（解决中文乱码）
import json
dict = {
'user': 'yubozhi',
'title': '硬盘不是“背锅侠',
'time': '2017-11-29'
}
print(json.dumps(dict, ensure_ascii=False))
# {"user": "yubozhi", "title": "硬盘不是“背锅侠", "time": "2017-11-29"}相关免费学习推荐：python视频教程