Beartype aims to be a very fast runtime type checking tool written in pure Python.

This package provides the stestr command, a parallel Python test runner built around subunit. It is designed to execute unittest test suites using multiple processes to split up execution of a test suite. It will also store a history of all test runs to help in debugging failures and optimizing the scheduler to improve speed.

This package provides Pytest extension which disables all network calls flowing through Python's socket interface

This package provides a pytest plugin for testing console scripts.

pytest_mpi is a plugin for pytest providing some useful tools when running tests under MPI, and testing MPI-related code.

This package provides a Pytest plugin powered by VCR.py to record and replay HTTP traffic.

This Pytest plugin provides unittest subTest() support and subtests fixture.

This plugin package provides a way to include information about the system, Python installation, and select dependencies in the header of the output when running pytest. It can be used with packages that are not affiliated with the Astropy project, but is optimized for use with astropy-related projects.

Pyinstrument is a Python profiler to help you optimize your code.

This package provides a extension for flake8 which uses pydocstyle to check docstrings.

This package provides a virtualenv fixture for the py.test framework.

This package provides a Python library for design by contract (DbC) and checking values, exceptions, and side-effects. In a nutshell, deal implements functionality to write bug-free code. By adding a few decorators to the code, providing free tests, static analysis, formal verification, and much more.

Mypy is an optional static type checker for Python that aims to combine the benefits of dynamic typing and static typing. Mypy combines the expressive power and convenience of Python with a powerful type system and compile-time type checking. Mypy type checks standard Python programs; run them using any Python VM with basically no runtime overhead.

This package aims to provide faster zlib and gzip compatible compression and decompression by implementing Python bindings for the ISA-L library.

Blosc is a high performance compressor optimized for binary data. It has been designed to transmit data to the processor cache faster than the traditional, non-compressed, direct memory fetch approach via a memcpy() system call.

Blosc works well for compressing numerical arrays that contains data with relatively low entropy, like sparse data, time series, grids with regular-spaced values, etc.

This Python package wraps the Blosc library.

Pyppmd provides classes and functions for compressing and decompressing text data, using the Prediction by partial matching (PPM) compression algorithm variation H and I.2. It provides an API similar to Python's zlib/bz2/lzma modules.

PPMd is a compression algorithm library using the Prediction by Partial Matching statistical technique. It is used in RAR and 7-Zip as one of several possible methods.

This module provides an xopen function that works like Python's built-in open function, but can also deal with compressed files. Supported compression formats are gzip, bzip2 and, xz, and are automatically recognized by their file extensions. The focus is on being as efficient as possible on all supported Python versions.

MultiVolumefile is a Python library that provides a file-object abstraction, making it possible to use multiple files as if they were a single file.

python-python-snappy provides bindings to the Snappy library and can be used to compress and decompress files and streams. It can also be used directly from the command line.

This package provides Python bindings to the Zstandard (zstd) compression library. The API is similar to Python's bz2/lzma/zlib module.

This package provides Python CFFI bindings to the Brotli library.

pyzopfli is a straight forward wrapper around the ZlibCompress method of the the zopfli library.

This package contains a very thin Python wrapper for libdeflate.