biconfigs 0.1.0

Biconfigs
=========

|Build Status| |Coverage| |Codacy grade| |Python Version| |PyPI| |PyPI|
|License|

📄⇄🛠 Two way configurations mapping helper for Python.

Get Started
-----------

.. code:: python

from biconfigs import Biconfigs
configs = Biconfigs('configs.json')

# Simply change the dict, and it will automatically save the changes to file.
configs['options'] = {'debug': True,
'username': 'Anthony',
'list': [] }

# Access with simple 'x.y.z' style
configs.options.list.append('example')

Content of file ``configs.json`` after execution:

.. code:: json

{
"options": {
"debug": true,
"list": [
"example"
],
"username": "Anthony"
}
}

Install
-------

.. code:: sh

pip install biconfigs

Dependencies
------------

**No dependencies** required 🎉

Tested on Python ``2.6``, ``2.7``, ``3.3``, ``3.4``, ``3.5``, ``pypy``,
``pypy3``

Documentation
-------------

When to save
~~~~~~~~~~~~

- Saving when: *Item create, item delete, list reorder, value change,
``get_set``, etc.*

.. code:: python

# All the following single statement will cause saving
configs['item'] = 'value'
configs['options'] = {}
configs.options['list'] = []
configs.options.list.append('example')
configs.options['list'] = []
configs.options.clear()
value2 = configs.get_set('item2', 45)

- Not saving when: *Item access, assignment but not changed, etc.*

.. code:: python

# All the following single statement will NOT cause saving
value = configs.item
configs['item'] = 'value' # The value of 'item' is not changed
value3 = configs.get('item_not_exists', 'default_value')

Non-blocking saving
~~~~~~~~~~~~~~~~~~~

By default, Biconfigs use asynchronous saving. You can disable the
feature by setting ``async_write`` to ``False``

.. code:: python

# set "async_write=False" if your want to use synchronous saving
# to ensure your data saved to file in time,
# WARNING: In sync mode, your changes will block the incoming statement
# until the file correctly saved.
configs = Biconfigs('configs.json', async_write=False)

configs['item'] = 'value' # Blocking
# Configure file saved already

# Your code...

High frequency update
~~~~~~~~~~~~~~~~~~~~~

Normally, Biconfigs will write the changes to file immediately. But
sometime you may want to update values frequently, which will result in
a IO bottleneck. So you can use **``with``** statement to prevent auto
saving for a while.

.. code:: python

with configs:
for i in range(1000):
configs['some_key'] = i
# This statement will execute saving process only one time when exiting "with" scope

Reload from file
~~~~~~~~~~~~~~~~

Simply use ``reload`` function to reload from file. *Note*: ``reload``
will discard all present data in Biconfigs-object and loads new ones
from file)

.. code:: python

configs.reload()

Parsers
~~~~~~~

Biconfigs use ``Prettified Json`` as default parser. You may want to set
``parser='json'`` to save as compacted json file.

.. code:: python

configs = Biconfigs('configs.json', parser='json')
configs['item'] = 'value'
configs['debug'] = False

configs.json:

.. code:: json

{"debug": false, "item": "value"}

**Available Parsers**

- ``json``: Compact JSON format
- ``pretty-json``: Prettified JSON
- *To be developed...*

License
-------

MIT

.. |Build Status| image:: https://img.shields.io/travis/antfu/biconfigs.svg?style=flat-square
:target: https://travis-ci.org/antfu/biconfigs
.. |Coverage| image:: https://img.shields.io/codecov/c/github/antfu/biconfigs.svg?style=flat-square
:target: https://codecov.io/gh/antfu/biconfigs
.. |Codacy grade| image:: https://img.shields.io/codacy/grade/4bf188eecc374c76b5c6ddbe93315078.svg?style=flat-square
:target: https://www.codacy.com/app/anthonyfu117/biconfigs/dashboard
.. |Python Version| image:: https://img.shields.io/pypi/pyversions/biconfigs.svg?style=flat-square
:target: https://pypi.python.org/pypi/biconfigs
.. |PyPI| image:: https://img.shields.io/pypi/v/biconfigs.svg?style=flat-square
:target: https://pypi.python.org/pypi/biconfigs
.. |PyPI| image:: https://img.shields.io/pypi/status/biconfigs.svg?style=flat-square
:target: https://pypi.python.org/pypi/biconfigs
.. |License| image:: https://img.shields.io/pypi/l/biconfigs.svg?style=flat-square
:target: https://github.com/antfu/biconfigs/blob/master/LICENSE