Version 6.0.0rc1

• Adding Cython support to greatly speed up normal Box operations on supported systems
• Adding #161 support for access box dots with get and checking with in (thanks to scott-createplay)
• Adding #183 support for all allowed character sets (thanks to Giulio Malventi)
• Adding #196 support for sliceable boxes (thanks to Dias)
• Changing #208 repr to produce eval-able text (thanks to Jeff Robbins)
• Changing #215 support ruamel.yaml new syntax (thanks to Ivan Pepelnjak)
• Changing update and merge_update to not use a keyword that could cause issues in rare circumstances
• Fixing internal _safe_key logic to be twice as fast
• Removing support for 3.6 as it is EOL
• Removing support for ruamel.yaml < 0.17

This is a pre-release and under testing, do not use in production

Version 5.4.1

• Fixing #205 setdefault behavior with box_dots (thanks to Ivan Pepelnjak)

Version 5.4.0

• Adding py.typed for mypy support (thanks to Dominic)
• Adding testing for Python 3.10-dev
• Fixing #189 by adding mappings for mypy
• Fixing setdefault behavior with box_dots (thanks to ipcoder)
• Changing #193 how magic methods are handled with default_box (thanks to Rexbard)

Version 5.3.0

• Adding support for functions to box_recast (thanks to Jacob Hayes)
• Adding #181 support for extending or adding new items to list during merge_update (thanks to Marcos Dione)
• Fixing maintain stacktrace cause for BoxKeyError and BoxValueError (thanks to Jacob Hayes)
• Fixing #177 that emtpy yaml files raised errors instead of returning empty objects (thanks to Tim Schwenke)
• Fixing #171 that popitems wasn't first checking if box was frozen (thanks to Varun Madiath)

Version 5.2.0

• Adding checks for frozen boxes to pop, popitem and clear (thanks to Varun Madiath)
• Fixing requirements-test.txt (thanks to Fabian Affolter)
• Fixing Flake8 conflicts with black (thanks to Varun Madiath)
• Fixing coveralls update (thanks to Varun Madiath)

Version 5.1.1

• Bugfix dots default (#166)

Version 5.1.0

• Adding dotted option for items function (thanks to ipcoder)
• Fixing bug in box.set_default where value is dictionary, return the internal value and not detached temporary (thanks to Noam Graetz)
• Removing warnings on import if optional libraries are missing

Version 5.0.1

• Fixing default box saving internal method calls and restricted options (thanks to Marcelo Huerta)

Version 5.0.0

• Adding support for msgpack converters to_msgpack and from_msgpack
• Adding support for comparision of Box to other boxes or dicts via the - sub operator #144 (thanks to Hitz)
• Adding support to | union boxes like will come default in Python 3.9 from PEP 0584
• Adding mypy type checking, black formatting and other checks on commit
• Adding new parameter box_class for cleaner inheritance #148 (thanks to David Aronchick)
• Adding dotted option for keys method to return box_dots style keys (thanks to ipcoder)
• Fixing box_dots to properly delete items from lists
• Fixing box_dots to properly find items with dots in their key
• Fixing that recast of subclassses of Box or BoxList were not fed box properties (thanks to Alexander Kapustin)
• Changing that sub boxes are always created to properly propagate settings and copy objects #150 (thanks to ipcoder)
• Changing that default_box will not raise key errors on pop #67 (thanks to Patrock)
• Changing to_csv and from_csv to have same string and filename options as all other transforms
• Changing back to no required external imports, instead have extra requires like [all] (thanks to wim glenn)
• Changing from putting all details in README.rst to a github wiki at https://github.com/cdgriffith/Box/wiki
• Changing BoxList.box_class to be stored in BoxList.box_options dict as box_class
• Changing del will raise BoxKeyError, subclass of both KeyError and BoxError
• Removing support for single level circular references
• Removing readthedocs generation
• Removing overrides for keys, values and items which will return views again

Version 5.0.0a3

Don't have a concept of depth for keys