Python解析JSON对象的全过程记录

{
 "students": [
 { "name":"北山啦" , "age":20 },
 { "name":"张三" , "age":30 },
 { "name":"里斯" , "age":17 }
 ]
}

{'students': [{'name': '北山啦', 'age': 20},
 {'name': '张三', 'age': 30},
 {'name': '里斯', 'age': 17}]}

import json

data = {
 "students": [
 { "name":"北山啦" , "age":20 },
 { "name":"张三" , "age":30 },
 { "name":"里斯" , "age":17 }
 ]
}
print(type(data))
print(data)
json_str = json.dumps(data)
print(type(json_str))

<class 'dict'>
{'students': [{'name': '北山啦', 'age': 20}, {'name': '张三', 'age': 30}, {'name': '里斯', 'age': 17}]}
<class 'str'>

import json

data = {
 "students": [
 { "name":"北山啦" , "age":20 },
 { "name":"张三" , "age":30 },
 { "name":"里斯" , "age":17 }
 ]
}

print(type(data))
print(data)
json_str = json.dumps(data, separators=('>>','::'), indent=2)
print(json_str)

<class 'dict'>
{'students': [{'name': '北山啦', 'age': 20}, {'name': '张三', 'age': 30}, {'name': '里斯', 'age': 17}]}
{
 "students"::[
 {
 "name"::"\u5317\u5c71\u5566">>
 "age"::20
 }>>
 {
 "name"::"\u5f20\u4e09">>
 "age"::30
 }>>
 {
 "name"::"\u91cc\u65af">>
 "age"::17
 }
 ]
}

import json

data = {
 "students": [
 { "name":"北山啦" , "age":20 },
 { "name":"张三" , "age":30 },
 { "name":"里斯" , "age":17 }
 ]
}
with open("students.txt","w") as fp:
 json.dump(data, fp, ensure_ascii=False)
 print("finish")

import json
with open("students.txt") as fp:
 data = json.load(fp)
 """取出字典key为students的数据，
 得到一个list，再从这个list中取第一个数据"""
 print(data['students'][0]) 

import json
with open("students.txt") as fp:
 data = json.load(fp, parse_int = float)
 print(data)

def fromJSON(dct): # 这里会对所有的字典数据类型都进行遍历
 if isinstance(dct, dict) and 'students' in dct:
 return dct['students']
 else:
 return Student(dct['name'], dct['age'])

import json

with open("students.txt") as fp:
 data = json.load(fp, object_hook=fromJSON)
 print(data)