python：Json模块dumps、loads、dump、load介绍，jsondumps,由上篇文章（pyth

python：Json模块dumps、loads、dump、load介绍，jsondumps,由上篇文章（pyth

由上篇文章（python3+requests：get/post请求）涉及到的json.dumps()扩展

1.json.dumps()用于将dict类型的数据转成str

备注：文件路径前面加上 r 是为了避免转义

 1 import json 2  3 dict = {‘a‘: ‘wo‘, ‘b‘: ‘zai‘, ‘c‘: ‘zhe‘, ‘d‘: ‘li‘} 4 string = json.dumps(dict) 5 print(dict) 6 print(string) 7 print(type(dict)) 8 print(type(string)) 9 10 with open(r‘C:\Users\zy\Documents\GitHub\python3\searchTest\json.json‘,‘w‘)as f:11     f.write(string)

1 {‘a‘: ‘wo‘, ‘b‘: ‘zai‘, ‘c‘: ‘zhe‘, ‘d‘: ‘li‘}2 {"a": "wo", "b": "zai", "c": "zhe", "d": "li"}3 <class ‘dict‘>4 <class ‘str‘>

如果没有进行转换，则会报错：TypeError: write() argument must be str, not dict

1 import json2 3 dict = {‘a‘: ‘wo‘, ‘b‘: ‘zai‘, ‘c‘: ‘zhe‘, ‘d‘: ‘li‘}4 with open(r‘C:\Users\zy\Documents\GitHub\python3\searchTest\json.json‘,‘w‘)as f:5     f.write(dict)

1 {‘a‘: ‘wo‘, ‘b‘: ‘zai‘, ‘c‘: ‘zhe‘, ‘d‘: ‘li‘}2 Traceback (most recent call last):3 <class ‘dict‘>4   File "C:/Users/zy/Documents/GitHub/python3/searchTest/json_test.py", line 11, in <module>5     f.write(dict)6 TypeError: write() argument must be str, not dict

2.json.loads():用于将str类型的数据转成dict

 1 dict = {‘a‘: ‘wo‘, ‘b‘: ‘zai‘, ‘c‘: ‘zhe‘, ‘d‘: ‘li‘} 2 dumps = json.dumps(dict) 3 loads = json.loads(dumps) 4  5 print(dict) 6 print(dumps) 7 print(loads) 8  9 print(type(dict))10 print(type(dumps))11 print(type(loads))

1 {‘a‘: ‘wo‘, ‘b‘: ‘zai‘, ‘c‘: ‘zhe‘, ‘d‘: ‘li‘}2 {"a": "wo", "b": "zai", "c": "zhe", "d": "li"}3 {‘a‘: ‘wo‘, ‘b‘: ‘zai‘, ‘c‘: ‘zhe‘, ‘d‘: ‘li‘}4 <class ‘dict‘>5 <class ‘str‘>6 <class ‘dict‘>

3.json.dump()用于将dict类型的数据转成str，并写入到json文件中

1 dict = {‘a‘: ‘wo‘, ‘b‘: ‘zai‘, ‘c‘: ‘zhe‘, ‘d‘: ‘li‘}2 json.dump(dict,open(r‘C:\Users\zy\Documents\GitHub\python3\searchTest\json.json‘,‘w‘))

4.json.load()用于从json文件中读取数据

1 filename = (r‘C:\Users\zy\Documents\GitHub\python3\searchTest\json.json‘)2 jsObj = json.load(open(filename))3 print(jsObj)4 print(type(jsObj))

1 {‘a‘: ‘wo‘, ‘b‘: ‘zai‘, ‘c‘: ‘zhe‘, ‘d‘: ‘li‘}2 <class ‘dict‘>

python：Json模块dumps、loads、dump、load介绍