pysimstring

library1.3.0pypypi✓ verified 82d ago

PySimString is a Python implementation of the simstring fast string similarity search library. Version 1.3.0 supports Python 3.7-3.13 across multiple platforms. It provides efficient approximate string matching using various similarity measures (cosine, dice, jaccard, overlap, exact) with configurable feature sizes.

data ai-ml

pip install pysimstring

github ↗package ↗

INSTALL

IMPORT

SIG · PYSIMSTRING

pysimstring

datapythonv1.3.0

Install

1.6s avg

Import

—

Disk

22MB

Pass rate

5/ 10

Env Coverage5 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v1.3.0 · 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

build_error

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 1.6s · import 0.000s · 24MB

22MB installed

● package 22MB

Code

Verified usage

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

simstring

✓ import pysimstring

✗ import simstring

Create a simstring database, add strings, and retrieve similar strings using cosine similarity.

import simstring # Build a database from a list of strings db = simstring.reader() db.add('hello') db.add('hallo') db.add('hullo') db.add('world') # Use cosine similarity with threshold 0.7 results = db.retrieve('hallo', measure='cosine', threshold=0.7) print(results) # ['hello', 'hallo', 'hullo']

Debug

Known issues

gotchaThe default similarity measure is 'exact' (not cosine). Ensure you specify the desired measure via the `measure` parameter if you need fuzzy matching.

fix

Explicitly set measure='cosine', 'dice', 'jaccard', or 'overlap'.

affects: all

gotchaThe reader must be created via `simstring.reader()`, not `simstring.SimString()` or any other constructor. The API changed from the original simstring C++ library.

fix

Use `db = simstring.reader()`.

affects: >=1.0.0

gotchaThe database is stored in memory. Adding a large number of strings can consume significant memory.

fix

Batch insert or use the `simstring.writer()` (if available) to write to disk; currently only reader/writer-based API.

affects: all

Upgrade

Version history

1.3.0latest on PyPI · released Apr 6, 2025

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Dependencies

No dependency data recorded yet.

Agent activity

10 hits · last 30 days

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OpenAI (training)

Resources

githubhttps://github.com/percevalw/simstring ↗

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