import json

jsonStr = '{"name":"zhangsan","age":18}'

# 将json字符串序列化为json对象
jsonObj = json.loads(jsonStr)
print(jsonObj, type(jsonObj)) #{'name': 'zhangsan', 'age': 18} <class 'dict'>

# 将json对象转换为json字符串
s1 = json.dumps(jsonObj)
print(s1, type(s1)) #{"name": "zhangsan", "age": 18} <class 'str'>

# 遍历json对象的键值对
for key in jsonObj:
    print(f"{key}: {jsonObj[key]}")
# output
# name: zhangsan
# age: 18

# python中json.dump和json.load等不加s的方法都是对文件操作

# 使用json.dumps方法将dict对象转换为json字符串

# json对象是针对具体的语言的 python中json对象是dict，js中的json对象是Object键值对，java中的json对象是JSON_Object
dict1={"province":"zhejiang","city":"hangzhou"}
s2= json.dumps(dict1)
print(s2,type(s2))
# {"province": "zhejiang", "city": "hangzhou"} <class 'str'>