You can install the newest version of pydicti from PyPI:
pip install pydicti
Alternatively, you can just take the file
pydicti.py and redistribute
it with your application.
class dicti: default case insensitive dictionary type
class odicti: ordered case insensitive dictionary type
def build_dicti: create a case insensitive dictionary class
def Dicti: create a case insensitive copy of a dictionary
Objects of type
dicti are dictionaries that feature case insensitive
>>> d = dicti(Hello='foo', world='bar') >>> d['heLLO'] 'foo' >>> 'WOrld' in d True
Internally however, the keys retain their original case:
>>> sorted(d.keys()) ['Hello', 'world']
odicti instanciates order-preserving case insensitive
>>> odicti(zip('abc', range(3))) Dicti(OrderedDict([('a', 0), ('b', 1), ('c', 2)]))
build_dicti you can create custom case insensitive dictionaries.
This function is what is used to create the
pydicti.odicti types. Note that calling
build_dicti several times
with the same argument will result in identical types:
>>> build_dicti(dict) is dicti True >>> build_dicti(OrderedDict) is odicti True
build_dicti uses subclassing to inherit the semantics of the given base
>>> issubclass(odicti, OrderedDict) True
Dicti is convenient for creating case insensitive
copies of dictionary instances:
>>> o = OrderedDict(zip('abcdefg', range(7))) >>> oi = Dicti(o) >>> type(oi) is odicti True
The subclassing approach allows to plug your dictionary instance into
places where typechecking with
isinstance is used, like in the json
>>> import json >>> d == json.loads(json.dumps(d), object_hook=dicti) True
You can use
json.loads(s, object_pairs_hook=odicti) to
deserialize ordered dictionaries.
The equality comparison tries preserves the semantics of the base type as well as reflexitivity. This has impact on the transitivity of the comparison operator:
>>> i = dicti(oi) >>> roi = odicti(reversed(list(oi.items()))) >>> roi == i and i == oi True >>> oi != roi and roi != oi # NOT transitive! True >>> oi == i and i == oi # reflexive True
The coercion rules in python allow this to work pretty well when performing comparisons between types that are subclasses of each other. Be careful otherwise, however.
Copyright © 2013 Thomas Gläßle <email@example.com>
This work is free. You can redistribute it and/or modify it under the terms of the Do What The Fuck You Want To Public License, Version 2, as published by Sam Hocevar. See the COPYING file for more details.
This program is free software. It comes without any warranty, to the extent permitted by applicable law.