A Python wrapper around CityHash
Getting Started
To use this package in your program, simply type
pip install cityhashAfter that, you should be able to import the module and do things with it (see usage example below).
Usage Examples
Stateless Hashing
The package contains 64- and 128-bit implementations of the CityHash algorithm, named as follows:
>>> from cityhash import CityHash32, CityHash64, CityHash128
>>> print(CityHash32("abc"))
795041479
>>> print(CityHash64("abc"))
2640714258260161385
>>> print(CityHash128("abc"))
76434233956484675513733017140465933893Incremental Hashing
The current implementation of CityHash does not support incremental hashing. If you require this feature, use MetroHash instead, which does support it.
Buffer Protocol Support
The methods in this module support Python Buffer Protocol, which allows them to be used on any object that exports a buffer interface. Here is an example showing hashing of a 4D NumPy array:
>>> import numpy as np
>>> arr = np.zeros((256, 256, 4))
>>> CityHash64(arr)
11496798039784891892Note that arrays need to be contiguous for this to work. To convert a non-contiguous array, use np.ascontiguousarray() method.
Development
For those who want to contribute, here is a quick start using some makefile commands:
git clone https://github.com/escherba/python-cityhash.git
cd python-cityhash
make env # creates a Python virtualenv
make test # run Python tests
make cpp-test # run C++ testsThe Makefiles provided have self-documenting targets. To find out which targets are available, type:
make helpSee Also
For other fast non-cryptographic hashing implementations available as Python extensions, see MetroHash and MurmurHash.
License
This software is licensed under the MIT License. See the included LICENSE file for details.
1 maintainer
Release files for cityhash 0.2.4.post10
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| cityhash-0.2.4.post10.tar.gz | 58.0 kB | Details |
Release files / cityhash-0.2.4.post10.tar.gz
| Download URL | cityhash-0.2.4.post10.tar.gz |
|---|---|
| Size | 58.0 kB |
| Tags | Source |
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SHA-256 checksum How to use checksums |
973f62d857086421a231302898f953f344086051daffe3d75a32460a61b53a92
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BLAKE2b-256 checksum How to use checksums |
9ae5c5dd6f959984c9e231af1cbf8c212f75ead9565472a1a076cdcd5857e37f
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