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CFFI enabled bindings to the CMPH library forcreating and using minimal perfect hashes

Project description

These bindings provide python with the ability to create and use Minimal Perfect Hashes via the CMPH library.

Latest version released on PyPi Build status Coverage Code Health


Should be as simple as

$ pip install cmph-cffi

Development version

The latest development version can be installed directly from GitHub:

$ pip install --upgrade 'git+'


Creating a new MPH

import cmph
with open('/usr/share/dict/words', 'w') as keys:
    mph = cmph.generate_hash(keys)

Getting keys out of an MPH



Be aware that whilst MPH’s are awesome, they typically cannot distinguish between keys they are built on and unseen keys. Concretely this means that feeding in keys that are not in the original key set will have undefined results

Saving the MPH

with open('/tmp/out.mph', 'w') as out_file:

Loading a pre-existing MPH

with open('/tmp/out.mph') as in_file:


Greg Bowyer (@GregBowyer) and Venkatesh Sharma (@Venkateshks) created these bindings and these fine people did all the hard implementation work in CMPH.

Reporting bugs

Please see BUG_REPORTS.




Please see LICENSE.

Project details

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