python之json

1 處理對象爲字符串時：

>>> import json
>>> data = {
...     'name' : 'ACME',
...     'shares' : 100,
...     'price' : 542.23
... }
>>> 
>>> json_str = json.dumps(data)
>>> print (json_str)
{"name": "ACME", "shares": 100, "price": 542.23}
>>> data = json.loads(json_str)
>>> print (data)
{'name': 'ACME', 'shares': 100, 'price': 542.23}
>>> type(data)
<class 'dict'>
>>> type(json_str)
<class 'str'>
>>> 

2 處理對象爲文件時：

# Writing JSON data
with open('data.json', 'w') as f:
    json.dump(data, f)

# Reading data back
with open('data.json', 'r') as f:
    data = json.load(f)