json dump dumps load loads

 1 #/usr/bin/env python3
 2 import json
 3 print("part1: str -> json")
 4 str1="[1,2,3]"
 5 jl=json.loads(str1)  # list
 6 print(type(jl))
 7 jd=json.dumps(str1)  # str
 8 print(type(jd))
 9 
10 
11 print("
  part2: list -> json")
12 d=[1,2,3,4,5]
13 a=json.dumps(d)   # str
14 print(type(a))
15 b=json.loads(a)   # list
16 print(type(b))
17 
18 
19 print("
  part3: 文件保存")
20 with open('json.txt','w') as f:
21     json.dump(d,f)
22     # f.write(json.dumps(d))
23 
24 with open('json.txt','r') as f:
25     a=json.load(f)  # list
26     print(type(a))
27 
28 
29 with open('json.txt', 'r') as f:
30     aa=f.read()
31     bb=json.loads(aa)  # list
32     print(type(bb))