Python中哪些常用操作最值得掌握？

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pythonimport jsonimport datetimeimport requests

url=www.baidu.comheaders={'Cookie': '123'}response=requests.get(url, headers=headers)

res=json.loads(response.text)print(datetime.datetime.now(), 'D01', res['data'])

• json

import datetime
import json

res=json.loads(rs)
print(datetime.datetime.now(),'D01', res['data'])

• http-get

import requests

url = "www.baidu.com"

payload = {}
headers = {
'Cookie': '123'
}

response = requests.request("GET", url, headers=headers, data = payload)

print(response.text.encode('utf8'))

• listdir

import os
for filename in os.listdir(r'.'):
print filename
os.rename(filename,filename.replace(' ','_'))