The JSON function needs to be imported into the JSON Library importjson. Function description json. dumps: encodes a Python object into a JSON string json. loads... JSON function
To use the JSON function, you must import the json Library: import json.
Function description
Json. dumps encodes a Python object into a JSON string
Json. loads decodes the encoded JSON string into a Python object
Json. dumps
Syntax
Json. dumps (obj, skipkeys = False, ensure_ascii = True, check_circular = True, allow_nan = True, cls = None, indent = None, separators = None, encoding = "UTF-8 ", default = None, sort_keys = False, ** kw)
Instance
The following example encodes arrays into JSON data:
#!/usr/bin/pythonimport jsondata = {'number': 6, 'name': 'Pythontab'}jsonData = json.dumps(data)print jsonData
The code execution result is:
{"number": 6, "name": "Pythontab"}
Note: You may find that the data has not changed after the preceding conversion. here we will talk about the following: double quotation marks are the string separator marked in json. single quotation marks are not standard.
Sort JSON data and format the output using parameters:
#!/usr/bin/pythonimport jsondata = {'number': 6, 'name': 'Pythontab'}jsonData = json.dumps(data, sort_keys=True, indent=4, separators=(',', ': '))print jsonData
Output result
{ "name": "Pythontab", "number": 6}
Conversion from the original python type to the json type table:
Python |
JSON |
Dict |
Object |
List, tuple |
Array |
Str, unicode |
String |
Int, long, float |
Number |
True |
True |
False |
False |
None |
Null |
Json. loads
Json. loads is used to decode JSON data. This function returns the data type of the Python field.
Syntax
Json. loads (s [, encoding [, cls [, object_hook [, parse_float [, parse_int [, parse_constant [, object_pairs_hook [, ** kw])
Instance
The following example shows how Python decodes a JSON object:
#!/usr/bin/pythonimport jsonjsonData = '{"number": 6, "name": "Pythontab"}'str = json.loads(jsonData)print str
The code execution result is:
{u'number': 6, u'name': u'Pythontab'}
Json type conversion to python type table:
JSON |
Python |
Object |
Dict |
Array |
List |
String |
Unicode |
Number (int) |
Int, long |
Number (real) |
Float |
True |
True |
False |
False |
Null |
None |
Use a third-party library: Demjson
Demjson is a third-party python module library that can be used to encode and decode JSON data. it contains the formatting and validation functions of JSONLint.
Github address: https://github.com/dmeranda/demjson
Environment configuration
Before using Demjson to encode or decode JSON data, we need to install the Demjson module.
Method 1: install with source code
$ Tar-xvzf demjson-2.2.4.tar.gz
$ Demjson-2.2.4 cd
$ Python setup. py install
Method 2: install using pip directly
Pip install Demjson
JSON Functions
Function description
Encode encodes a Python object into a JSON string
Decode can use the demjson. decode () function to decode JSON data. This function returns the data type of the Python field.
Encode syntax
Demjson. encode (self, obj, nest_level = 0)
Decode syntax
Demjson. decode (self, txt)
It is very easy to use, so I will not give an example here ~~
The above is a detailed explanation of the Python JSON parsing content. For more information, see other related articles in the first PHP community!