sentence-stream
A small sentence splitter for text streams
Decision gist · record as of 2026-08-14
Yes, if you need to split sentences from text that arrives in arbitrary chunks or streams. The low install friction, active maintenance, permissive license, and focused scope make it a straightforward addition to streaming pipelines. Not necessary if your text is already buffered or sentence-aligned.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.9 or later.
- Low friction: pure Python wheel with a single runtime dependency (regex).
- Last commit 2026-08-11 and active maintenance status suggest the project is current.
License · maintenance · safety
Apache-2.0 (permissive) — Apache-2.0 permissive license allows commercial and private use with minimal restrictions—suitable for most projects.
last release 2026-01-08 (218 days) · last repo commit 2026-08-11 · 3 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 375,237 downloads/mo, #7,140 on PyPI
Alternatives
Verify before relying
pip install sentence-stream
from sentence_stream import stream_to_sentences
text_chunks = ["Hello world", ". This is", " a test."]
sentences = list(stream_to_sentences(text_chunks))
# For async: from sentence_stream import async_stream_to_sentences- Whether regex dependency adds meaningful overhead or compatibility constraints beyond what sentence-stream itself requires.
- Performance characteristics on very large streams or highly fragmented chunk boundaries.
What it is and what it does
Sentence Stream is a lightweight sentence splitter designed to handle text that arrives in arbitrary chunks—such as streaming responses from language models or network I/O—and reassemble them into complete sentences. Rather than requiring text to be buffered until word or sentence boundaries align, it processes chunks as they arrive and yields complete sentences when boundaries are detected.
The package provides both synchronous (stream_to_sentences) and asynchronous (async_stream_to_sentences) interfaces, making it suitable for integration into streaming pipelines. It depends only on the regex library and supports Python 3.9 through 3.13, keeping installation friction minimal.
Use it for
- Process streaming LLM responses to extract complete sentences as they arrive, without buffering entire outputs.
- Split real-time chat or voice transcription streams into sentence units for downstream NLP processing.
- Handle network-streamed text (e.g., HTTP chunked responses) and emit complete sentences incrementally.
- Build sentence-aware streaming pipelines in async applications where text arrives in unpredictable fragment sizes.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need to split sentences from text that arrives in arbitrary chunks or streams.
The low install friction, active maintenance, permissive license, and focused scope make it a straightforward addition to streaming pipelines. Not necessary if your text is already buffered or sentence-aligned.
Install
sentence-stream on PyPI
Before you install
Low friction: pure Python wheel with a single runtime dependency (regex). Last commit 2026-08-11 and active maintenance status suggest the project is current.
Requires Python 3.9 or later.
License in practice
Apache-2.0 permissive license allows commercial and private use with minimal restrictions—suitable for most projects.
Quickstart
pip install sentence-stream
from sentence_stream import stream_to_sentences
text_chunks = ["Hello world", ". This is", " a test."]
sentences = list(stream_to_sentences(text_chunks))
# For async: from sentence_stream import async_stream_to_sentencesVerify before relying
- Whether regex dependency adds meaningful overhead or compatibility constraints beyond what sentence-stream itself requires.
- Performance characteristics on very large streams or highly fragmented chunk boundaries.
Package facts
| License | Apache-2.0 permissive |
| Python support | Supports the current Python release >=3.9.0 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 1 packageregex |
| Maintenance | Actively maintained 218 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 375,237 / month, #7,140 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 3 - AlphaIntended Audience :: DevelopersLicense :: OSI Approved :: Apache Software LicenseProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.9Topic :: Text Processing :: Linguistic |
Evidence: sentence_stream-1.3.0-py3-none-any.whl
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