harper-py
Python bindings for Harper, Automattic's offline English grammar checker written in Rust: grammar, spelling and style in milliseconds, in process, with no Java and no server. Unofficial; the API is the official harper.js one, in snake_case.
pip install harper-py
from harper import Linter
linter = Linter() # build once and reuse: construction loads the dictionary
text = "This is an test of the the linter."
for lint in linter.lint(text):
print(f"{lint.span.start}: {lint.problem_text!r} {lint.message}")
print(" ", linter.apply_suggestion(text, lint, lint.suggestions[0]))
8: 'an' Incorrect indefinite article.
This is a test of the the linter.
19: 'the the' Did you mean to repeat this word?
This is an test of the linter.
Spans are str indices, so text[lint.span.start:lint.span.end] is always the flagged
text, emoji included. Markdown (the default), plain text and Typst are understood;
dialects, rule configuration, a user dictionary, ignored lints and Weirpacks work as in
harper.js. The guide
has the tour.
Why not language-tool-python
| harper-py | language-tool-python | |
|---|---|---|
| Runtime | none, the wheel is self-contained | Java ≥ 17 and a local LanguageTool server it starts |
| Download | 9.7–10.4 MB wheel, depending on the platform | a 60 kB wheel, then the LanguageTool 6.8 zip (259 MB) on first use |
| Cold start | 0.23 s: import harper + Linter() in a fresh process |
starts a JVM server (not measured: no Java on this machine) |
| Lint 1007 words | 23 ms (first call in a process: 95 ms) | — |
Measured on an Apple M4 Mac mini, CPython 3.11, with benchmarks/bench.py. LanguageTool
has far more rules and languages; Harper is the choice when you want English checking that
starts fast and ships as a plain dependency.
Platforms
Wheels for Linux (glibc and musl; x86_64, aarch64), macOS (arm64, x86_64) and Windows (x64, arm64); one abi3 wheel per platform covers CPython 3.10 and later. Building the sdist needs a Rust toolchain.
Same as harper.js
Linter is harper.js's Linter interface, synchronous: organizedLints →
organized_lints, getLintConfig → get_lint_config, LintOptions → keyword
arguments. Harper inside is 2.11.0 (harper-core, harper-stats, harper-typst
from crates.io), with harper-wasm's features. Lints are checked against harper-cli of
the same version on a 52-document corpus, and harper.js's own test suite is ported.
Every difference is listed in
DEVIATIONS.md.
License
Apache-2.0, like Harper. The binding layer is ported from Harper's harper-wasm.
1 maintainer
Metadata
1 maintainer
Release files for harper-py 0.1.1
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| harper_py-0.1.1.tar.gz | 78.6 kB | Details |
Built distributions (wheels)
| File | Reset | |||
|---|---|---|---|---|
| harper_py-0.1.1-cp310-abi3-win_arm64.whl | CPython 3.10 | abi3 | Windows ARM64 | Details |
| harper_py-0.1.1-cp310-abi3-win_amd64.whl | CPython 3.10 | abi3 | Windows x86-64 | Details |
| harper_py-0.1.1-cp310-abi3-musllinux_1_2_x86_64.whl | CPython 3.10 | abi3 | Linux musl 1.2+ x86-64 | Details |
| harper_py-0.1.1-cp310-abi3-musllinux_1_2_aarch64.whl | CPython 3.10 | abi3 | Linux musl 1.2+ ARM64 | Details |
| harper_py-0.1.1-cp310-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl | CPython 3.10 | abi3 | Linux glibc 2.17+ x86-64 | Details |
| harper_py-0.1.1-cp310-abi3-manylinux_2_17_aarch64.manylinux2014_aarch64.whl | CPython 3.10 | abi3 | Linux glibc 2.17+ ARM64 | Details |
| harper_py-0.1.1-cp310-abi3-macosx_11_0_arm64.whl | CPython 3.10 | abi3 | macOS 11.0+ ARM64 | Details |
| harper_py-0.1.1-cp310-abi3-macosx_10_12_x86_64.whl | CPython 3.10 | abi3 | macOS 10.12+ x86-64 | Details |
Total release size: 80.6 MB
Release files / harper_py-0.1.1.tar.gz
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