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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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