What are the python code snippets?

Python code snippet: 1. Requests to crawl images; 2. uuid, the code is [from uuid import uuid4]; 3. Get the cpu memory usage; 4. Convert dictionary to json, the code is [print( json.dumps(dict, ..)】.

Python code segment:

1, requests to crawl images

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, get cpu memory usage

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. Convert dictionary to json (solve Chinese garbled characters)

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"}

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