pymorphy3
Morphological analyzer (POS tagger + inflection engine) for Russian language.
Decision gist · record as of 2026-08-14
Yes, if you need Russian or Ukrainian morphological analysis. The package is stable, permissively licensed, has low install friction, and carries no known vulnerabilities. Aging maintenance is a minor concern but not a blocker for a mature analyzer; verify that Ukrainian support meets your production requirements before committing.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Low friction install with a pure-Python wheel.
- Maintenance is aging—last release was 309 days ago—but the repository remains active with recent commits and no archived status.
License · maintenance · safety
MIT license (permissive) — MIT license permits commercial and private use with minimal restrictions; you must retain the license notice in distributions.
last release 2025-10-09 (309 days) · last repo commit 2025-10-09 · 144 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 434,356 downloads/mo, #6,692 on PyPI
Alternatives
Verify before relying
pip install pymorphy3
from pymorphy3 import MorphAnalyzer
morph = MorphAnalyzer()
analyzed = morph.parse('слово')
print(analyzed[0].tag)- Whether Ukrainian support is production-ready or still experimental relative to Russian
- Performance characteristics on large text corpora or real-time NLP pipelines
- Actual download volume and adoption patterns in production systems
What it is and what it does
pymorphy3 is a morphological analyzer for Russian and Ukrainian that identifies parts of speech, lemmas, and grammatical attributes in text. It is a maintained continuation of the unmaintained pymorphy2 project. The package provides a POS tagger and inflection engine, allowing you to parse words into their base forms and extract grammatical metadata like case, number, and tense.
The package depends on dawg2-python for efficient dictionary lookup and pymorphy3-dicts-ru for Russian language data. It supports Python 3.9 through 3.14 and is classified as Beta. It is widely used in Russian NLP workflows, though its aging maintenance status (309 days since last release) suggests it is stable but not actively developed.
Use it for
- Extract lemmas and POS tags from Russian text for downstream NLP tasks like classification or entity recognition.
- Normalize Russian user input or search queries by reducing inflected forms to their base words.
- Build Russian language text processing pipelines that require morphological annotation.
- Analyze Ukrainian text for grammatical attributes and inflection patterns.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need Russian or Ukrainian morphological analysis.
The package is stable, permissively licensed, has low install friction, and carries no known vulnerabilities. Aging maintenance is a minor concern but not a blocker for a mature analyzer; verify that Ukrainian support meets your production requirements before committing.
Install
pymorphy3 on PyPI
Before you install
Low friction install with a pure-Python wheel. Maintenance is aging—last release was 309 days ago—but the repository remains active with recent commits and no archived status.
License in practice
MIT license permits commercial and private use with minimal restrictions; you must retain the license notice in distributions.
Quickstart
pip install pymorphy3
from pymorphy3 import MorphAnalyzer
morph = MorphAnalyzer()
analyzed = morph.parse('слово')
print(analyzed[0].tag)Verify before relying
- Whether Ukrainian support is production-ready or still experimental relative to Russian
- Performance characteristics on large text corpora or real-time NLP pipelines
- Actual download volume and adoption patterns in production systems
Package facts
| License | MIT license permissive |
| Python support | Not specified |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 3 packagesdawg2-pythonpymorphy3-dicts-rusetuptools |
| Maintenance | Aging 309 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 434,356 / month, #6,692 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 4 - BetaIntended Audience :: DevelopersIntended Audience :: Science/ResearchLicense :: OSI Approved :: MIT LicenseNatural Language :: RussianProgramming Language :: PythonProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.9Programming Language :: Python :: Implementation :: CPythonProgramming Language :: Python :: Implementation :: PyPyTopic :: Scientific/Engineering :: Information AnalysisTopic :: Software Development :: Libraries :: Python ModulesTopic :: Text Processing :: Linguistic |
Evidence: pymorphy3-2.0.6-py3-none-any.whl
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See also pymorphy2 · pymorphy3-dicts-ru · pymorphy3-dicts-uk · lemminflect · pymorphy2-dicts-ru · mecab-python3 · PyStemmer · mecab-ko · vokativ · simplemma