update based on PR feedback

This commit is contained in:
Sam Clift
2015-01-18 14:22:30 +00:00
parent 332fdcd6f1
commit 37ed5fc40a
+10 -49
View File
@@ -1,15 +1,12 @@
JSON
===========
====
The `json <https://docs.python.org/2/library/json.html>`_ library can read JSON strings into a Python dictionary or list. It can also serialize Python dictionaries or lists into JSON strings.
* There are six basic types in JSON: objects, lists, numbers, strings, booleans, and null.
* The root element of JSON representation is an object, signified by ``{ ... }``. JSON objects are analogous to Python dictionaries: they have keys which correspond to values.
* JSON does not use single quotes. JSON exclusively uses double quotes. Using single quotes in the place of double quotes is invalid JSON syntax.
The `json <https://docs.python.org/2/library/json.html>`_ library can parse JSON from strings or files. When parsing, the library converts the JSON into a Python dictionary or list. It can also parse Python dictionaries or lists into JSON strings.
Parsing JSON
------------
The `json <https://docs.python.org/2/library/json.html>`_ libary is imported like this:
The json libary is imported like this:
.. code-block:: python
@@ -21,7 +18,7 @@ Take the following string containing JSON data:
json_string = '{"first_name": "Guido", "last_name":"Rossum"}'
It can be manpulated like this:
It can be parsed like this:
.. code-block:: python
@@ -31,9 +28,10 @@ and can now be used as a normal dictionary:
.. code-block:: python
converted_dict['first_name']
print(converted_dict['first_name'])
"Guido"
As well as converting a JSON string to a dictionary. You can convert a dictionary to JSON:
You can also convert a dictionary to JSON:
.. code-block:: python
@@ -45,47 +43,10 @@ As well as converting a JSON string to a dictionary. You can convert a dictionar
print(json.dumps(d))
"{'first_name':'Guido','last_name':'Rossum'}"
We can also load a JSON file by using ``json.load`` instead of ``json.loads``:
.. code-block:: python
with file('path/to/file.json') as json_file:
processed_json = json.load(json_file)
print(processsed_json)
{u'first_name': u'Guido', u'last_name': u'Rossum'}
Here's an example of writing directly to a file by using ``json.dump`` instead of ``json.dumps``:
.. code-block:: python
with file('path/to/file.json', 'w') as json_file:
dict = {
"first_name": "Guido",
"last_name": "Rossum",
"middle_name": "Van"
}
json.dump(dict, json_file)
simplejson
----------
`simplejson <https://simplejson.readthedocs.org/en/latest/>`_ is the externally maintained development version of the json library.
simplejson mimics the json standard library, so you can start using simplejson instead of json by importing it under a different name
Installation
.. code-block:: python
pip install simplejson
Usage
.. code-block:: python
import simplejson as json
simplejson is available so that developers that use an older version of python can use the latest features available in the json lib.
simplejson mimics the json standard library, it is available so that developers that use an older version of python can use the latest features available in the json lib.