polytypo
Locale-correct quotes, dashes, ellipses, apostrophes, symbols and no-break spaces —
one portable spec, designed for byte-identical output across runtimes.
Try it live, no install: polytypo.dev
This is the Python implementation. The full spec — all locales, all rules, worked examples in
each — lives in polytypo/polytypo. This runtime supports
the text and html modes fully, and markdown for the commonmark dialect only — mdx
raises POLYTYPO_INVALID_DIALECT (no MDX/JSX parser is available for Python; see
Supported dialects).
Install
pip install polytypo
Usage
from polytypo import transform
transform("She said, \"it's fine\" -- but I wasn't sure...", locale="en-US")
# She said, “it’s fine”—but I wasn’t sure…
Same input, one locale changed — quotes, dash spacing and all follow the target locale, not a single hardcoded style:
transform('Sie sagte: "Alles gut" -- aber ich war mir nicht sicher...', locale="de-DE")
# Sie sagte: „Alles gut“ – aber ich war mir nicht sicher…
HTML and Markdown are first-class modes, not an afterthought — tags, attributes and fenced code are left alone; only text content is touched:
from polytypo.html import transform
transform('<a title="test... wait">Wait... she said "go on."</a>', locale="en-US")
# <a title="test... wait">Wait… she said “go on.”</a>
polytypo.text, polytypo.html and polytypo.markdown each exclude the parser dependency the
other modes don't need (importing polytypo.text never imports html.parser-based span
extraction or tree-sitter). The aggregate polytypo module supports every mode via a mode
keyword, defaulting to "text". locale has no default anywhere and must always be passed
explicitly — there is no silent fallback to English.
import polytypo
polytypo.transform("...", locale="fr", mode="markdown", dialect="commonmark")
Supported dialects
markdown mode requires a dialect keyword, exactly as the spec requires (no default,
detection is forbidden). This runtime supports dialect="commonmark" (CommonMark plus GFM —
tables, strikethrough, task lists, autolink literals). dialect="mdx" is a real dialect the spec
names, but this runtime has no MDX/JSX parser for it and raises POLYTYPO_INVALID_DIALECT
immediately rather than silently mishandling it — a narrower, honest conformance claim, not a
port defect.
Licence
MIT. See LICENSE.
1 maintainer
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