✨ pydensity ✨

The python binding for density

安装

pip install pydensity

使用

• encode

import pydensity
origin = b"121212121212121"
size = pydensity.decompress_safe_size(len(origin))
data = pydensity.compress(origin, pydensity.Algorithm.lion)
print(pydensity.decompress(data, size))

公开函数

from typing import Any
import enum

class Algorithm(enum.Enum):
    chameleon: Any
    cheetah: Any
    lion: Any

def format_state(state) -> str: ...
def major_version(): ...
def minor_version(): ...
def revision_version(): ...
def get_dictionary_size(algorithm: Algorithm): ...
def compress_safe_size(input_size: int): ...
def decompress_safe_size(input_size: int): ...

class Compressor:
    c_state: Any
    context: Any
    def __init__(self, algorithm: Algorithm, custom_dictionary: bool) -> None: ...
    @property
    def state(self): ...
    def compress(self, data: bytes) -> bytes: ...
    def __del__(self) -> None: ...

class DeCompressor:
    c_state: Any
    context: Any
    def __init__(self, data: bytes, custom_dictionary: bool) -> None: ...
    @property
    def state(self): ...
    def decompress(self, data: bytes, decompress_safe_size: int) -> bytes: ...
    def __del__(self) -> None: ...

def compress(data: bytes, algorithm: Algorithm) -> bytes: ...
def compress_into(data: bytes, out: bytearray, algorithm: Algorithm) -> int: ...
def decompress(data: bytes, decompress_safe_size: int) -> bytes: ...
def decompress_into(data: bytes, out: bytearray) -> int: ...

本机编译

python -m pip install setuptools wheel cython cffi
git clone https://github.com/synodriver/pydensity
cd pydensity
git submodule update --init --recursive
python setup.py bdist_wheel --use-cython --use-cffi

后端选择

默认由py实现决定，在cpython上自动选择cython后端，在pypy上自动选择cffi后端，使用DENSITY_USE_CFFI环境变量可以强制选择cffi