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faster-eth-utils

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library5.3.27pypypi✓ verified 87d ago

A faster fork of eth-utils providing common utility functions for Python code that interacts with Ethereum, implemented in C. Current version 5.3.26, requires Python >=3.10 and <4. Released frequently, approximately weekly.

http-networkingserialization
pip install faster-eth-utils
github ↗package ↗docs ↗changelog ↗
INSTALL
IMPORT
SIG · FASTER-ETH-UTILS
F
faster-eth-utils
http-networkingpythonv5.3.27
Install
4.2s avg
Import
698ms
Disk
45MB
Pass rate
10/ 10
Env Coverage10 / 10
glibc
3.9–3.13
musl
3.9–3.13
Install & Compatibility
Where this runs
tested against v5.3.27 · 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 0.722s · 45.4MB
glibc
py 3.10–3.95 runs
installs and imports cleanly · install 4.2s · import 0.674s · 48MB
45MB installed
● package 45MB
Code
Verified usage

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

to_bytes
✓ from eth_utils import to_bytes
✗ from faster_eth_utils import to_bytes
faster-eth-utils is a drop-in replacement; import from eth_utils as usual, but the C implementation is used automatically if installed.
to_checksum_address
✓ from eth_utils import to_checksum_address
✗ from faster_eth_utils import to_checksum_address
Same as above; import from eth_utils.
keccak
✓ from eth_utils import keccak
✗ from faster_eth_utils import keccak
Use eth_utils for all imports; faster-eth-utils monkey-patches or replaces under the hood.

Basic usage: import from eth_utils as if using the original eth-utils. faster-eth-utils accelerates functions transparently.

from eth_utils import to_bytes, to_checksum_address, keccak # Example: convert hex to bytes result = to_bytes(hexstr='0xdeadbeef') print(result) # Example: checksum address addr = to_checksum_address('0x5aAeb6053F3E94C9b9A09f33669435E7Ef1BeAed') print(addr) # Example: keccak hash hash = keccak(b'test') print(hash.hex())
Debug
Known issues
deprecatedPython 3.9 support removed. Requires Python >=3.10.
fix
Upgrade Python to 3.10+.
affects: >=5.3.0
breakingFunction signatures may change in minor versions. Test thoroughly when upgrading.
fix
Pin version and review changelog before upgrading.
affects: >=5.0.0
gotchaDo not install both eth-utils and faster-eth-utils in the same environment. faster-eth-utils is intended as a replacement.
fix
Uninstall eth-utils before installing faster-eth-utils, or use a virtual environment.
affects: all
Errors
Common errors & fixes
ImportError: cannot import name 'to_bytes' from 'eth_utils'
Missing dependency or incompatible version of eth-utils / faster-eth-utils.
fix
Ensure faster-eth-utils is installed (pip install faster-eth-utils) and that eth-utils is not installed separately.
ModuleNotFoundError: No module named 'eth_utils'
faster-eth-utils is not installed, or the import path is wrong.
fix
Install faster-eth-utils (pip install faster-eth-utils). Import from eth_utils, not faster_eth_utils.
TypeError: to_bytes() got an unexpected keyword argument 'hexstr'
Using an older version of eth-utils API that is not supported in faster-eth-utils.
fix
Check the function signature in the latest documentation. For to_bytes, use hexstr= parameter as shown, or upgrade to the latest version.
Upgrade
Version history
5.3.27latest on PyPI · released May 27, 2026
Audit
Dependencies

No dependency data recorded yet.

Agent activity
6 hits · last 30 days
node
6
Resources
githubhttps://github.com/BobTheBuidler/faster-eth-utils ↗
packagehttps://pypi.org/project/faster-eth-utils/ ↗
docshttps://eth-utils.readthedocs.io/en/stable/ ↗
changeloghttps://github.com/BobTheBuidler/faster-eth-utils/releases ↗