python中json與dict之間轉換

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Python之dict(或對象)與json之間的互相轉化

在Python語言中，json資料與dict字典以及對象之間的轉化，是必不可少的操作。

在Python中內建json庫。通過import json匯入。

在json模組有2個方法，

• loads()：將json資料轉化成dict資料
• dumps()：將dict資料轉化成json資料
• load()：讀取json檔案資料，轉成dict資料
• dump()：將dict資料轉化成json資料後寫入json檔案

下面是具體的樣本：

dict字典轉json資料

import jsondef dict_to_json():    dict = {}    dict[‘name‘] = ‘many‘    dict[‘age‘] = 10    dict[‘sex‘] = ‘male‘    print(dict)  # 輸出：{‘name‘: ‘many‘, ‘age‘: 10, ‘sex‘: ‘male‘}    j = json.dumps(dict)    print(j)  # 輸出：{"name": "many", "age": 10, "sex": "male"}if __name__ == ‘__main__‘:    dict_to_json()

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對象轉json資料

import jsondef obj_to_json():    stu = Student(‘007‘, ‘007‘, 28, ‘male‘, ‘13000000000‘, ‘[email protected]‘)    print(type(stu))  # <class ‘json_test.student.Student‘>    stu = stu.__dict__  # 將對象轉成dict字典    print(type(stu))  # <class ‘dict‘>    print(stu)  # {‘id‘: ‘007‘, ‘name‘: ‘007‘, ‘age‘: 28, ‘sex‘: ‘male‘, ‘phone‘: ‘13000000000‘, ‘email‘: ‘[email protected]‘}    j = json.dumps(obj=stu)    print(j)  # {"id": "007", "name": "007", "age": 28, "sex": "male", "phone": "13000000000", "email": "[email protected]"}if __name__ == ‘__main__‘:    obj_to_json()

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json資料轉成dict字典

import jsondef json_to_dict():    j = ‘{"id": "007", "name": "007", "age": 28, "sex": "male", "phone": "13000000000", "email": "[email protected]"}‘    dict = json.loads(s=j)    print(dict)  # {‘id‘: ‘007‘, ‘name‘: ‘007‘, ‘age‘: 28, ‘sex‘: ‘male‘, ‘phone‘: ‘13000000000‘, ‘email‘: ‘[email protected]‘}if __name__ == ‘__main__‘:    json_to_dict()

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json資料轉成對象

import jsondef json_to_obj():    j = ‘{"id": "007", "name": "007", "age": 28, "sex": "male", "phone": "13000000000", "email": "[email protected]"}‘    dict = json.loads(s=j)    stu = Student()    stu.__dict__ = dict    print(‘id: ‘ + stu.id + ‘ name: ‘ + stu.name + ‘ age: ‘ + str(stu.age) + ‘ sex: ‘ + str(        stu.sex) + ‘ phone: ‘ + stu.phone + ‘ email: ‘ + stu.email)  # id: 007 name: 007 age: 28 sex: male phone: 13000000000 email: [email protected]if __name__ == ‘__main__‘:    json_to_obj()

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json的 load()與 dump()方法的使用

• dump()方法的使用

import jsondef dict_to_json_write_file():    dict = {}    dict[‘name‘] = ‘many‘    dict[‘age‘] = 10    dict[‘sex‘] = ‘male‘    print(dict)  # {‘name‘: ‘many‘, ‘age‘: 10, ‘sex‘: ‘male‘}    with open(‘1.json‘, ‘w‘) as f:        json.dump(dict, f)  # 會在目錄下產生一個1.json的檔案，檔案內容是dict資料轉成的json資料if __name__ == ‘__main__‘:    dict_to_json_write_file()

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• load()的使用

import jsondef json_file_to_dict():    with open(‘1.json‘, ‘r‘) as f:        dict = json.load(fp=f)        print(dict)  # {‘name‘: ‘many‘, ‘age‘: 10, ‘sex‘: ‘male‘}if __name__ == ‘__main__‘:    json_file_to_dict()

python中json與dict之間轉換