mirror of
https://github.com/kennethreitz/python-guide.git
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Sam Clift
139 lines
2.8 KiB
ReStructuredText
139 lines
2.8 KiB
ReStructuredText
JSON parsing
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===========
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json
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-----
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`json <https://docs.python.org/2/library/json.html>`_ is a standard libary which can convert JSON to a Dictionay.
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For example, a JSON string like this:
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.. code-block:: python
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"{'first_name':'Guido','last_name':'Rossum'}"
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can be loaded like this:
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.. code-block:: python
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import json
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converted_dict = json.loads(json_string)
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you can now use it as a normal dictionary:
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.. code-block:: python
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converted_dict['first_name']
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As well as converting a JSON string to a dictionary. You can convert a dictionary to JSON
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For example, given:
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.. code-block:: python
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d = {
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'first_name': 'Guido',
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'second_name': 'Rossum'
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}
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import json
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print json.dumps(d)
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"{'first_name':'Guido','last_name':'Rossum'}"
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It is also possible to import JSON files:
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.. code-block:: python
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import json
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with file('path/to/file.json') as json_file:
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processed_json = json.load(json_file)
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print processsed_json
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{u'first_name': u'Guido', u'last_name': u'Rossum'}
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As well as write to them:
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.. code-block:: python
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import json
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with file('path/to/file.json', 'w') as json_file:
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dict = {
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"first_name": "Guido",
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"last_name": "Rossum",
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"middle_name": "Van"
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}
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json.dump(dict, json_file)
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simplejson
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----------
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Installation
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.. code-block:: python
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pip install simplejson
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`simplejson <https://simplejson.readthedocs.org/en/latest/>`_ is the externally maintained development version of the json library.
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simplejson is updated much more frequently than the Python. Meaning you can get updates much quicker.
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For example, a JSON string like this:
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.. code-block:: python
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"{'first_name':'Guido','last_name':'Rossum'}"
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can be loaded like this:
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.. code-block:: python
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import simplejson
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converted_dict = simplejson.loads(json_string)
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you can now use it as a normal dictionary:
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.. code-block:: python
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converted_dict['first_name']
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As well as converting a json string to dictionarys. You can convert dictionarys to json
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For example, given:
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.. code-block:: python
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import simplejson
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d = {
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'first_name': 'Guido',
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'second_name': 'Rossum'
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}
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print simplejson.dumps(d)
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"{'first_name':'Guido','last_name':'Rossum'}"
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It is also possible to import JSON files:
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.. code-block:: python
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import simplejson
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with file('path/to/file.json') as json_file:
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processed_json = simplejson.load(json_file)
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print processsed_json
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{u'first_name': u'Guido', u'last_name': u'Rossum'}
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As well as write to them:
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.. code-block:: python
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import simplejson
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with file('path/to/file.json', 'w') as json_file:
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dict = {
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"first_name": "Guido",
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"last_name": "Rossum",
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"middle_name": "Van"
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}
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simplejson.dump(dict, json_file)
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