Dictionary and json conversion mainly use the following methods:
- loads(): convert json data into dict data
- dumps(): convert dict data into json data
Dictionary to json data:
In [5]: import json
In [6]: dict = {'name':'mary','age':21}
In [7]: type(dict)
Out[7]: dict
In [8]: j = json.dumps(dict)
In [9]: j
Out[9]: '{"name": "mary", "age": 21}'
It should be noted here that if the dictionary contains Chinese characters when converting to json, encoding problems will occur , as follows:
In [29]: staff = {'name':'权权','age':23,'sex':'女'}
In [30]: json.dumps(staff)
Out[30]: '{"name": "\\u6743\\u6743", "age": 23, "sex": "\\u5973"}'
So if there is Chinese, we need to add parameters for processing:
In [31]: json.dumps(staff,ensure_ascii=False)
Out[31]: '{"name": "权权", "age": 23, "sex": "女"}'
原因: Usually the request is json data in post mode, but if there is Chinese, there is a problem, because Chinese is encoded in unicode, but it is parsed in ASCII by default. Chinese is not in ASCII encoding, so Chinese cannot be displayed.
Convert json data to dictionary:
In [25]: j
Out[25]: '{"name": "mary", "age": 21}'
In [26]: result = json.loads(j)
In [27]: result
Out[27]: {'name': 'mary', 'age': 21}
In [28]: type(result)
Out[28]: dict