pyccobs
pyccobs provides Python bindings to ccobs
using only the standard library's ctypes module. The ccobs C library is
vendored and built into the package, so a separate ccobs installation is not
required. It includes one-shot and streaming APIs as well as exposing the
native library handle.
Build and use
Python 3.11+ and CMake 3.15+ are required.
python -m pip install -e .
The package build invokes the vendored ccobs CMake project directly. Because
the package uses ctypes rather than the CPython extension API, the resulting
wheel is tagged for Python 3 generally (for example, py3-none-win_amd64).
Set CCOBS_LIBRARY_PATH to a compatible shared library (or its directory) to
override the bundled copy when testing a different ccobs build.
import ccobs
wire = ccobs.encode(b"hello\0world")
assert ccobs.decode(wire) == b"hello\0world"
batch = ccobs.encodev([b"first", b"", b"third"])
assert batch == b"".join(ccobs.encode(item) for item in [b"first", b"", b"third"])
encoder = ccobs.Encoder()
wire = encoder.feed(b"hello ") + encoder.feed(b"world", end_message=True)
wire += encoder.feedv([b"second", b"third"])
encoder.close()
decoder = ccobs.Decoder()
decoded, used, frame_sizes = decoder.feedv(wire)
decoder.close()
Decoder.feed() returns (decoded_bytes, consumed_bytes, message_complete)
and stops after the first complete frame. Decoder.feedv() returns
(decoded_bytes, consumed_bytes, frame_sizes) and
decodes every complete frame in the supplied chunk in one ccobs_decodev()
call. frame_sizes gives the decoded size of each completed frame in the flat
output; a size may include bytes returned by an earlier partial call.
Encoder.feedv() encodes a batch of complete messages through the native
streaming vector API. Both stateful classes are context managers and have
reset() and close().
For direct access to ccobs_create, ccobs_encodev, and the rest of the C API,
use ccobs.load_library(). Its functions have their ctypes argtypes and
restype declarations installed.
1 maintainer
Metadata
1 maintainer
Release files for pyccobs 0.1.0
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Source distribution (sdist)
| File | Size | Uploaded | Provenance | |
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| pyccobs-0.1.0.tar.gz | 15.8 kB | With provenance | Details |
Built distributions (wheels)
| File | Reset | |||
|---|---|---|---|---|
| pyccobs-0.1.0-py3-none-win_amd64.whl | Python 3 | none | Windows x86-64 | Details |
| pyccobs-0.1.0-py3-none-manylinux2014_aarch64.manylinux_2_17_aarch64.whl | Python 3 | none | Linux glibc 2.17+ ARM64 | Details |
| pyccobs-0.1.0-py3-none-manylinux1_x86_64.manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_5_x86_64.whl | Python 3 | none | Linux glibc 2.5+ x86-64, Linux glibc 2.17+ x86-64 | Details |
| pyccobs-0.1.0-py3-none-macosx_11_0_arm64.whl | Python 3 | none | macOS 11.0+ ARM64 | Details |
| pyccobs-0.1.0-py3-none-macosx_10_9_x86_64.whl | Python 3 | none | macOS 10.9+ x86-64 | Details |
Total release size: 109.9 kB
Release files / pyccobs-0.1.0.tar.gz
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