轉載請注明出處：https://www.cnblogs.com/shapeL/p/9037670.html
由上篇文章（python3+requests：get/post請求）涉及到的json.dumps()擴展
1.json.dumps()用於將dict類型的數據轉成str
備注：文件路徑前面加上 r 是為了避免轉義
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'>
如果沒有進行轉換，則會報錯：TypeError: write() argument must be str, not dict
1 import json 2
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
json.dumps()參數解釋：常用參數解釋
indent：應該是一個非負的整型，如果是0，或者為空，則一行顯示數據；否則會換行且按照indent的數量顯示前面的空白
sort_keys：將數據根據keys的值進行排序
1 response = requests.post(url=url,headers=headers).json() 2 print(json.dumps(response,sort_keys=True,indent=4))
舉例結果：
1 { 2 "code": "200", 3 "message": "", 4 "redirect": "", 5 "value": { 6 "name": "so", 7 "title": "360", 8 "value": "2"
9 } 10 }
2.json.loads():用於將str類型的數據轉成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()用於將dict類型的數據轉成str，並寫入到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()用於從json文件中讀取數據
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'>