nocasedict

library2.2.0pypypi✓ verified 84d ago

A case-insensitive ordered dictionary for Python. Version 2.2.0, supports Python >=3.9. Released under Apache 2.0. Maintained with irregular releases.

serialization database

pip install nocasedict

github ↗package ↗docs ↗changelog ↗

INSTALL

IMPORT

SIG · NOCASEDICT

nocasedict

serializationpythonv2.2.0

Install

1.5s avg

Import

12ms

Disk

16MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v2.2.0 · pip install

no network on importno background threads

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.95 runs

installs and imports cleanly · install 0.0s · import 0.012s · 18.2MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 1.5s · import 0.012s · 19MB

16MB installed

● package 16MB

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

NocaseDict

✓ from nocasedict import NocaseDict

✗ import nocasedict.NocaseDict

NocaseDict is a top-level class, not a module.

Create a case-insensitive dictionary and access keys case-insensitively.

from nocasedict import NocaseDict d = NocaseDict({'KEY': 'value'}) print(d['key']) # 'value' print(d['KEY']) # 'value' d['NewKey'] = 1 print('newkey' in d) # True

Debug

Known issues

breakingVersion 2.0.0 dropped support for Python 2.7 and 3.5. Also changes how keys are stored internally; no more separate lowercase key store. Bulk import may break if using internal attributes.

fix

Upgrade to 2.x only if using Python >=3.6. Code relying on __dict__ or internal key storage will break.

affects: <2.0.0

deprecatedThe 'NocaseDict.fromkeys' class method is deprecated since 2.2.0 and will be removed in a future release.

fix

Use dict.fromkeys and convert: NocaseDict(dict.fromkeys(keys, value)).

affects: 2.2.0 and later

gotchaEquality comparison with regular dict is case-sensitive. NocaseDict('a':1) == {'a':1} is True, but NocaseDict('A':1) == {'a':1} is False.

fix

Be aware that case-insensitivity only applies within NocaseDict itself, not when comparing to dict.

affects: all

gotchaInheritance from NocaseDict may cause unexpected behavior because it overrides __setitem__ and __getitem__ for case-insensitivity. Custom subclasses must carefully call super().

fix

Ensure you override all relevant methods and call super().__setitem__ with the intended key.

affects: all

Errors

Common errors & fixes

ImportError: No module named 'nocasedict'

Library not installed or installed in a different Python environment.

fix

Run: pip install nocasedict

AttributeError: module 'nocasedict' has no attribute 'NocaseDict'

Incorrect import: trying to import from the module but the class is not found due to wrong import statement.

fix

Use: from nocasedict import NocaseDict

TypeError: 'NocaseDict' object does not support item assignment

Accidentally passed a frozen instance or tried to use mappingproxy-like behavior.

fix

Create a new NocaseDict from the frozen one: NocaseDict(frozen_dict)

Upgrade

Version history

2.2.0latest on PyPI · released Jan 4, 2026

Audit

Dependencies

No dependency data recorded yet.

Agent activity

6 hits · last 30 days

node

Resources

githubhttps://github.com/pywbem/nocasedict ↗

packagehttps://pypi.org/project/nocasedict/ ↗

docshttps://nocasedict.readthedocs.io/en/master/ ↗

changeloghttps://nocasedict.readthedocs.io/en/master/changes.html ↗