biconfigs

Biconfigs

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📄⇄🛠 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"
  }
}

* Biconfigs also supports CSON <#cson>__ and YAML <#yaml>__ file formats.

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,
   ``setdefault``, 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.setdefault('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
-  ``cson``: CSON format, refer to `CSON <#cson>`__
-  ``yaml``: YAML format, refer to `YAML <#yaml>`__

CSON
----

Biconfigs supports `CSON <https://github.com/bevry/cson>`__ by
`avakar/pycson <https://github.com/avakar/pycson>`__

.. code:: python

    from biconfigs import Biconfigs
    from biconfigs import parser_cson

    configs = Biconfigs('configs.cson', parser='cson')
    # Then use biconfigs as you normally would...

**Extra requirements**

To use CSON, you need to install extra requirement

.. code:: sh

    pip install biconfigs[cson]

Or install ``cson`` manually:

.. code:: sh

    pip install cson

**CSON problems**

Please check `avakar/pycson: The
Language <https://github.com/avakar/pycson#the-language>`__

YAML
----

Biconfigs supports `YAML <http://yaml.org/>`__ by
`PyYAML <http://pyyaml.org/>`__

.. code:: python

    from biconfigs import Biconfigs
    from biconfigs import parser_yaml

    configs = Biconfigs('configs.yml', parser='yaml')
    # Then use biconfigs as you normally would...

**Extra requirements**

To use YAML, you need to install extra requirement

.. code:: sh

    pip install biconfigs[yaml]

Or install ``PyYAML`` manually:

.. code:: sh

    pip install PyYAML

License
-------

MIT

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   :target: https://travis-ci.org/antfu/biconfigs
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   :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
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   :target: https://pypi.python.org/pypi/biconfigs
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   :target: https://github.com/antfu/biconfigs/blob/master/LICENSE