leptris (Python) — bindings for libleptris
leptris wraps the libleptris
C API (XML 1.0 parsing, XPath 1.0) using cffi in ABI mode — the
cdef in leptris/_ffi.py mirrors libleptris's public headers.
The pinned libleptris version lives in libleptris-version.txt
(lockstep releases); CI builds it from the release tarball. The
binding loads the shared library from LEPTRIS_LIB_PATH or the
loader path.
Requirements
- Python 3.8+
cffi(pip install cffi)- libleptris as a shared library (
libleptris.dylib/libleptris.so) on the loader path, or pointed to byLEPTRIS_LIB_PATH. For a development checkout:
cmake -B build -S . -DLEPTRIS_BUILD_SHARED=ON
cmake --build build --target leptris_shared
export LEPTRIS_LIB_PATH=$PWD/build/src/libleptris.dylib
Quick start
from leptris import Document
doc = Document.parse("<library><book id='1'>Ulysses</book></library>")
doc.root.name # "library"
book = doc.root.first_child_element
book.name # "book"
book.attribute("id") # "1"
book.text # "Ulysses"
doc.xpath("count(//book)") # 1.0
[e.text for e in doc.xpath("//book")] # ["Ulysses"]
doc.close() # or: with Document.parse(xml) as doc: ...
Layout
leptris/_ffi.py— cdef + shared-library loading (single source of the C surface, mirroring the Ruby binding'slib/leptris.rb)leptris/document.py,element.py,node.py,xpath.py,error.py— typed wrapperstests/— pytest suite (run:pytestwithLEPTRIS_LIB_PATHset)
Memory model
The Document owns the whole tree and its pool. Accessor strings
are copied into Python str at the boundary, so nothing depends on
document lifetime after a call returns. Elements keep a reference to
their Document, so the pool cannot be freed while any wrapper is
alive. Prefer explicit close() / the context manager; __del__ is
a refcounting safety net, not a contract.
Versioning
The package version tracks libleptris (lockstep): library 1.1.0 ↔ leptris 1.1.0.
Publishing
Releases publish to PyPI via .github/workflows/release.yml,
using PyPI trusted publishing (no stored credentials). The
workflow runs on manual dispatch (ships the version in
pyproject.toml) and is called by the libleptris release flow
(publish: true), so every libleptris release ships the wheel.
Local development
python3 -m venv .venv
./.venv/bin/pip install --upgrade build setuptools wheel pytest cffi
./.venv/bin/python -m build
LEPTRIS_LIB_PATH=../../build-shared/src/libleptris.dylib \
./.venv/bin/python -m pytest tests/ -q
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