anycrc

library2.0.0pypypi✓ verified 85d ago

anycrc is a Python library providing extremely fast CRC (Cyclic Redundancy Check) calculations. It leverages hardware acceleration on Intel (SSE4.2, AVX512) and Arm (ARMv8-CRC) processors for significant speedups, claiming up to 10x faster than previous versions. The current version is 2.0.0, maintaining an active development pace with notable updates for performance and Python version compatibility.

serialization data

pip install anycrc

github ↗package ↗

INSTALL

IMPORT

SIG · ANYCRC

anycrc

serializationpythonv2.0.0

Install

2.4s avg

Import

40ms

Disk

19MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v2.0.0 · pip install

no network on importno background threads

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.910 runs

installs and imports cleanly · install 0.0s · import 0.024s · 20.4MB

glibc

py 3.10–3.910 runs

installs and imports cleanly · install 2.4s · import 0.024s · 22MB

19MB installed

● package 19MB

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

crc

✓ from anycrc import crc

Initialize a CRC algorithm object and then use its `calc()` method to compute the checksum for byte-like data.

from anycrc import crc # Calculate CRC32 MPEG2 c32 = crc.crc32_mpeg2() checksum_mpeg2 = c32.calc(b"Hello, World!") print(f"CRC32 MPEG2 of 'Hello, World!': {checksum_mpeg2:08x}") # Calculate CRC16 CCITT c16 = crc.crc16_ccitt() checksum_ccitt = c16.calc(b"Another string") print(f"CRC16 CCITT of 'Another string': {checksum_ccitt:04x}")

Debug

Known issues

breakingVersion 2.0.0 switched the underlying CRC implementation from `crcany` to a custom library and introduced significant API changes due to a new object caching mechanism (introduced in 1.3.0). Direct calls to global functions like `anycrc.crc32()` are no longer supported.

fix

Update your code to instantiate CRC algorithms as objects (e.g., `c = crc.crc32_mpeg2()`) and then call the `calc()` method on the instance (e.g., `c.calc(data)`). Refer to the official documentation or GitHub README for updated API usage.

affects: >=1.3.0, >=2.0.0

deprecatedPython 3.7 support was officially dropped in version 1.3.5. Users running Python 3.7 will not be able to install or use anycrc versions 1.3.5 or newer.

fix

Upgrade your Python environment to version 3.8 or newer to use current `anycrc` releases.

affects: >=1.3.5

gotchaWhile anycrc provides significant speedups through hardware acceleration on compatible Intel and Arm CPUs, performance will degrade to a software implementation if the necessary CPU features (e.g., SSE4.2, AVX512 for Intel; ARMv8-CRC for Arm) are not present.

fix

No action is strictly required as the library gracefully falls back. However, for maximum performance, ensure the application runs on hardware with the specified CRC acceleration instructions. No user-level configuration is available to force hardware acceleration.

affects: All versions >=2.0.0

Errors

Common errors & fixes

AttributeError: module 'anycrc.crc' has no attribute 'crc32_mpeg2'

Attempting to access a CRC algorithm directly from the `anycrc` module or as a static method, when it's an attribute of the `crc` submodule and requires instantiation.

fix

Ensure you are importing `crc` as `from anycrc import crc` and then instantiating the specific CRC algorithm, e.g., `c = crc.crc32_mpeg2()`.

TypeError: calc() missing 1 required positional argument: 'data'

This error occurs if you try to call the `calc()` method on the CRC algorithm class itself (e.g., `crc.crc32_mpeg2.calc(data)`) instead of on an instantiated object of that class.

fix

First create an instance of the CRC algorithm: `c = crc.crc32_mpeg2()`, then call `calc()` on that instance: `checksum = c.calc(data)`.

TypeError: argument must be a bytes-like object, not str

The `calc()` method expects binary data (bytes or bytearray) for CRC calculation, but a string was provided.

fix

Convert your string to bytes using `.encode()` or prefix it with `b` (e.g., `b"my string"`) before passing it to `calc()`.

Upgrade

Version history

2.0.0latest on PyPI · released Mar 24, 2026

Audit

Dependencies

No dependency data recorded yet.

Agent activity

35 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/marzooqy/anycrc ↗

packagehttps://pypi.org/project/anycrc/ ↗