orderedmultidict
Ordered Multivalue Dictionary
Decision gist · record as of 2026-08-14
Yes, if you need multivalue dictionary semantics. The package is stable, has no known vulnerabilities, installs with low friction, and is in the public domain. The 269-day maintenance gap is a minor concern for a mature library, but the active repository and broad Python version support (2.7, 3.6–3.9, PyPy) make it reliable for existing projects. Not necessary if you can use a list-of-tuples or a dict-of-lists instead.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Installation is straightforward with low friction; the package depends only on six and ships as a pure Python wheel.
- Maintenance is aging—no releases in 269 days—but the repository remains active and the codebase is stable.
License · maintenance · safety
Unlicense (permissive) — Released under the Unlicense and placed in the public domain, so there are no licensing restrictions on use, modification, or redistribution.
last release 2025-11-18 (269 days) · last repo commit 2025-11-18 · 68 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 6,009,079 downloads/mo, #1,986 on PyPI
Alternatives
Verify before relying
pip install orderedmultidict
from orderedmultidict import omdict
omd = omdict()
omd.add(1, 'first')
omd.add(1, 'second')
print(omd.getlist(1)) # [1, 'first', 'second']- Current compatibility with Python versions beyond 3.9 (classifiers list 3.9 as the highest)
- Whether the package is actively maintained or in maintenance-only mode given the 269-day gap since last release
What it is and what it does
orderedmultidict (omdict) is a dictionary implementation that allows multiple values to be stored under a single key, while maintaining the order in which keys and values were inserted or modified. It provides method parity with Python's built-in dict, so it can often be used as a drop-in replacement. The package depends only on six and is written in pure Python, making it lightweight and portable.
The primary use case is handling data structures where a key naturally maps to multiple values—such as URL query parameters or form submissions—while preserving the sequence of insertions. It supports standard dict operations like update(), get(), and items(), alongside multidict-specific methods like add(), addlist(), and getlist() for managing multiple values per key.
Use it for
- Parse and manipulate URL query strings where parameters may repeat (used by furl)
- Store form submission data where a field name may have multiple values
- Build ordered key-value stores that need to preserve insertion sequence across updates
- Replace dict in code that needs multivalue semantics without rewriting the API
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need multivalue dictionary semantics.
The package is stable, has no known vulnerabilities, installs with low friction, and is in the public domain. The 269-day maintenance gap is a minor concern for a mature library, but the active repository and broad Python version support (2.7, 3.6–3.9, PyPy) make it reliable for existing projects. Not necessary if you can use a list-of-tuples or a dict-of-lists instead.
Install
orderedmultidict on PyPI
Before you install
Installation is straightforward with low friction; the package depends only on six and ships as a pure Python wheel. Maintenance is aging—no releases in 269 days—but the repository remains active and the codebase is stable.
License in practice
Released under the Unlicense and placed in the public domain, so there are no licensing restrictions on use, modification, or redistribution.
Quickstart
pip install orderedmultidict
from orderedmultidict import omdict
omd = omdict()
omd.add(1, 'first')
omd.add(1, 'second')
print(omd.getlist(1)) # [1, 'first', 'second']Verify before relying
- Current compatibility with Python versions beyond 3.9 (classifiers list 3.9 as the highest)
- Whether the package is actively maintained or in maintenance-only mode given the 269-day gap since last release
Package facts
| License | Unlicense permissive |
| Python support | Not specified |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 1 packagesix |
| Maintenance | Aging 269 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 6,009,079 / month, #1,986 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableIntended Audience :: DevelopersLicense :: Freely DistributableNatural Language :: EnglishProgramming Language :: Python :: 2Programming Language :: Python :: 2.7Programming Language :: Python :: 3Programming Language :: Python :: 3.6Programming Language :: Python :: 3.7Programming Language :: Python :: 3.8Programming Language :: Python :: 3.9Programming Language :: Python :: Implementation :: PyPyTopic :: Software Development :: Libraries |
Evidence: orderedmultidict-1.0.2-py2.py3-none-any.whl
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See also boltons · multidict · ordereddict · fractional-indexing · nocasedict · orderly-set · ordered-set · sortedcollections · vdf · yamlloader