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google-crc32c

library1.8.0pypypi✓ verified 25d ago

A Python wrapper of the C library 'Google CRC32C', currently at version 1.8.0. It supports Python versions from 3.9 onwards and is actively maintained with regular updates.

gcp serialization

pip install google-crc32c

github ↗package ↗

INSTALL

IMPORT

SIG · GOOGLE-CRC32C

google-crc32c

gcppythonv1.8.0

Install

1.7s avg

Import

10ms

Disk

16MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v1.8.0 · 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 3.10–3.95 runs

installs and imports cleanly · install 0.0s · import 0.002s · 17.9MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 1.7s · import 0.000s · 18MB

16MB installed

● package 16MB

Code

Verified usage

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

Checksum

✓ from google_crc32c import Checksum

✗ from google_crc32c import crc32c

value

✓ from google_crc32c import value

✗ from google_crc32c import crc32c

extend

✓ from google_crc32c import extend

✗ from google_crc32c import crc32c

Calculate the CRC32C checksum of a byte string.

import os from google_crc32c import crc32c # Example usage data = b'This is a test' checksum = crc32c(data) print('CRC32C Checksum:', checksum)

Debug

Known issues

breakingPython versions below 3.9 are not supported.

fix

Upgrade Python to 3.9 or higher.

affects: <3.9

breakingThe 'crc32c' object cannot be imported from 'google_crc32c', even with the correct import syntax 'from google_crc32c import crc32c'. This typically occurs when the library's C extension fails to build or load, preventing the `crc32c` function from being properly exposed by the module. A pure Python fallback might be used, but could also lead to issues if not correctly initialized.

fix

Ensure your build environment contains necessary C compiler tools (e.g., 'build-base' on Alpine, 'gcc' on Debian/Ubuntu) and Python development headers (e.g., 'python3-dev' or 'python-dev'). Install these dependencies before installing `google-crc32c`. For Alpine, this often means `apk add build-base python3-dev`. If a pure Python fallback is intended, verify its implementation correctly exposes `crc32c`.

affects: All

Upgrade

Version history

1.8.0latest on PyPI · released Dec 16, 2025

Audit

Dependencies

No dependency data recorded yet.

Agent activity

37 hits · last 30 days

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OpenAI (training)

Resources

githubhttps://github.com/googleapis/python-crc32c ↗

packagehttps://pypi.org/project/google-crc32c/ ↗