python json 讀寫操作
阿新 • • 發佈:2018-12-19
json
1、dumps把json型別轉換成字串
import json new_dict = {'s_uid': 1, 's_date': ['2017-05-01', '2017-05-15'], 's_T': 2, 's_time': ['12:00:00', '17:00:00'], 's_local': 2, 'percent': 0.53, 'loss': 0.3, 'a': 4} print(new_dict) print(type(new_dict)) json_str = json.dumps(new_dict) print(json_str) print(type(json_str))
結果:
{'a': 4, 'loss': 0.3, 's_date': ['2017-05-01', '2017-05-15'], 's_uid': 1, 's_time': ['12:00:00', '17:00:00'], 's_local': 2, 'percent': 0.53, 's_T': 2} <type 'dict'> {"a": 4, "loss": 0.3, "s_date": ["2017-05-01", "2017-05-15"], "s_uid": 1, "s_time": ["12:00:00", "17:00:00"], "s_local": 2, "percent": 0.53, "s_T": 2} <type 'str'>
2、dump把json型別轉換成字串並存儲在檔案中
with open("mode.json","w") as f:
json.dump(dict,f)
3、loads把字串轉換成json型別
new_dict = json.loads(json_str)
print(new_dict)
print(type(new_dict))
結果:
{u'a': 4, u'loss': 0.3, u's_T': 2, u'percent': 0.53, u's_date': [u'2017-05-01', u'2017-05-15'], u's_uid': 1, u's_time': [u'12:00:00', u'17:00:00'], u's_local': 2} <type 'dict'>
4、load把檔案開啟從字串轉換成json型別
with open("mode.json",'r') as load_f:
load_dict = json.load(load_f)
print(load_dict)