Dotty-Dict

:Info: Dictionary wrapper for quick access to deeply nested keys. :Author: Pawel Zadrozny @pawelzny pawel.zny@gmail.com

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Features

• Simple wrapper around python dictionary and dict like objects
• Two wrappers with the same dict are considered equal
• Access to deeply nested keys with dot notation: dot['deeply.nested.key']
• Create, read, update and delete nested keys of any length
• Expose all dictionary methods like .get, .pop, .keys and other
• Access dicts in lists by index dot['parents.0.first_name']
• key=value caching to speed up lookups and low down memory consumption
• support for setting value in multidimensional lists
• support for accessing lists with slices

Installation

.. code:: bash

pip install dotty-dict

• Package: https://pypi.org/project/dotty-dict/
• Source: https://github.com/pawelzny/dotty_dict

Documentation

• Full documentation: http://dotty-dict.readthedocs.io
• Public API: http://dotty-dict.readthedocs.io/en/latest/api.html
• Examples and usage ideas: http://dotty-dict.readthedocs.io/en/latest/examples.html

TODO

Waiting for your feature requests ;)

Quick Example

Create new dotty using factory function.

.. code-block:: python

from dotty_dict import dotty dot = dotty({'plain': {'old': {'python': 'dictionary'}}}) dot['plain.old'] {'python': 'dictionary'}

You can start with empty dotty

.. code-block:: python

from dotty_dict import dotty dot = dotty() dot['very.deeply.nested.thing'] = 'spam' dot Dotty(dictionary={'very': {'deeply': {'nested': {'thing': 'spam'}}}}, separator='.', esc_char='\')

dot['very.deeply.spam'] = 'indeed' dot Dotty(dictionary={'very': {'deeply': {'nested': {'thing': 'spam'}, 'spam': 'indeed'}}}, separator='.', esc_char='\')

del dot['very.deeply.nested'] dot Dotty(dictionary={'very': {'deeply': {'spam': 'indeed'}}}, separator='.', esc_char='\')

dot.get('very.not_existing.key') None

NOTE: Using integer in dictionary keys will be treated as embedded list index.

Install for development

Install dev dependencies

.. code-block:: console

$ make install

Testing

.. code-block:: console

$ make test

Or full tests with TOX:

.. code-block:: console

$ make test-all

Limitations

In some very rare cases dotty may not work properly.

• When nested dictionary has two keys of different type, but with the same value. In that case dotty will return dict or list under random key with passed value.

• Keys in dictionary may not contain dots. If you need to use dots, please specify dotty with custom separator.

• Nested keys may not be bool type. Bool type keys are only supported when calling keys with type defined value (e.g. dot[True], dot[False]).