sliceable-dict

A simple dictionary that support slicing and multiple key selection.

Installation and requirements

sliceable-dict requires Python 3.7+ to run and can be installed by running

pip install sliceable-dict

Usage

The provided class SliceDict is an extended dictionary. It behaves exactly as the buildin dict for single (hashable) keys, but adds some additional features. Namely, getting and setting multiple keys at once, slicing with integers and boolean selection.

An example usage:

>>> from sliceable_dict import SliceDict
>>> d = SliceDict(zero=0, one=1)
>>> d
{'zero': 0, 'one': 1,}

# multi-key support 
>>> d[['two', 'three']] = 2, 3
>>> d[['one', 'three']]
{'one': 1, 'three': 3}

# slicing
>>> d[:]
{'zero': 0, 'one': 1, 'two': 2, 'three': 3}
>>> d[1:-1]
{'one': 1, 'two': 2}
>>> d[1::2]
{'one': 1, 'three': 3}

# boolean selection
>>> bool_list = [True, False, True, False]
>>> selection = d[bool_list]
>>> selection
{'zero': 0, 'two': 2}

# views as for buildin dict
>>> kv = selection.keys()
>>> kv
KeysView({'zero': 0, 'two': 2})
>>> list(kv)
['zero', 'two']

>>> vv = selection.values()
>>> vv
ValuesView({'zero': 0, 'two': 2})
>>> list(vv)
[0, 2]