JSON的全称是JavaScript Object Notation，即JavaScript对象符号，它是一种轻量级、跨平台、跨语言的数据交换格式，其设计意图是把所有事情都用设计的字符串来表示，这样既方便在互联网上传递信息，也方便人进行阅读。

JSON主要有两种数据结构：

• 由kye-value对组成的数据结构。这种数据结构在不同的语言中有不同的实现。例如在Python中是一种dict对象；在C语言中是一个struct；在其他语言中，则可能是record等。
• 有序集合。这种数据结构在Python中对应于列表list；在其他语言中，可能对应于list等。

kye-value对组成的数据结构（对应Python中字典dict）

方法一：

    data = {}result_data = {}data['name'] = 'John'data['age'] = 15result_data['result'] = 'OK'result_data['message'] = 'success'result_data['data'] = datas = json.dumps(result_data)print(type(s), s)

方法二：

    s1 = '{"result":"OK", "message":"success", "data":{"name":"jone", "age":"15"}}'print(type(s1), s1)response = json.loads(s1)print(response)

有序集合（对应Python中列表list）

    book_list1 = [{'imgs_name':['1_1.jpg', '1_2.jpg', '1_3.jpg'], 'imgs_w':[1080, 720, 640], 'imgs_h':[1440, 1080, 640]}, {'imgs_name':['1_1.jpg', '1_2.jpg', '1_3.jpg'], 'imgs_w':[1080, 720, 640], 'imgs_h':[1440, 1080, 640]}]print('book_list1(list->json):', type(book_list1), book_list1)book_json1 = json.dumps(book_list1)print('book_json1(list->json):', type(book_json1), book_json1)# not the same#book_json2 = '[{"imgs_name":["1_1.jpg","1_2.jpg","1_3.jpg"],"imgs_w":["1080","720","640"],"imgs_h":["1440","1080","640"]},{"imgs_name":["1_1.jpg","1_2.jpg","1_3.jpg"],"imgs_w":["1080","720","640"],"imgs_h":["1440","1080","640"]}]'# not the same #book_json2 = '[{"imgs_name": ["1_1.jpg", "1_2.jpg", "1_3.jpg"], "imgs_w": ["1080", "720", "640"], "imgs_h": ["1440", "1080", "640"]}, {"imgs_name": ["1_1.jpg", "1_2.jpg", "1_3.jpg"], "imgs_w": ["1080", "720", "640"], "imgs_h": ["1440", "1080", "640"]}]'# samebook_json2 = '[{"imgs_name": ["1_1.jpg", "1_2.jpg", "1_3.jpg"], "imgs_w": [1080, 720, 640], "imgs_h": [1440, 1080, 640]}, {"imgs_name": ["1_1.jpg", "1_2.jpg", "1_3.jpg"], "imgs_w": [1080, 720, 640], "imgs_h": [1440, 1080, 640]}]'# shell input format#book_json_input = [{\"imgs_name\":[\"1_1.jpg\",\"1_2.jpg\",\"1_3.jpg\"],\"imgs_w\":[\"1080\",\"720\",\"640\"],\"imgs_h\":[\"1440\",\"1080\",\"640\"]},{\"imgs_name\":[\"1_1.jpg\",\"1_2.jpg\",\"1_3.jpg\"],\"imgs_w\":[\"1080\",\"720\",\"640\"],\"imgs_h\":[\"1440\",\"1080\",\"640\"]}]print('book_json2(json->list):', type(book_json2), book_json2)book_list2 = json.loads(book_json2)print('book_list2(json->list):', type(book_list2), book_list2)print('book_list2[0](json->list):', book_list2[0])from difflib import Differd = Differ()diff = d.compare(book_json1.splitlines(), book_json2.splitlines())print('\n'.join(list(diff)))if book_json1 == book_json2:print('book_json1 and book_json2 is the same!')else:print('book_json1 and book_json2 is not the same!')