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Original, standard and customisable versions of the Jaro-Winkler functions.

Project description


Original, standard and customisable versions of the Jaro-Winkler functions.

>>> import jaro
>>> jaro.jaro_winkler_metric(u'SHACKLEFORD', u'SHACKELFORD')
>>> help(jaro)

Help on package jaro:

jaro - Python translation of the original Jaro-Winkler functions.`

The Jaro-Winkler functions compare two strings and return a score indicating
how closely the strings match. The score ranges from 0 (no match) to 1
(perfect match).

Two null strings ('') will compare as equal. Strings should be unicode
strings, and will be compared as given; the caller is responsible for
capitalisations and trimming leading/trailing spaces.

You should normally only need to use either the jaro_metric() or
jaro_winkler_metric() functions defined here. If you want to implement your
own, non-standard metrics, look at the comments and functions in the

<strong>PACKAGE CONTENTS</strong>

<strong>jaro_metric</strong>(string1, string2)
The standard, basic Jaro string metric.

<strong>jaro_winkler_metric</strong>(string1, string2)
The Jaro metric adjusted with Winkler's modification, which boosts
the metric for strings whose prefixes match.

<strong>original_metric</strong>(string1, string2)
The same metric that would be returned from the reference Jaro-Winkler
C code, taking as it does into account a typo table and adjustments for
longer strings.

<strong>custom_metric</strong>(string1, string2, typo_table, typo_scale,
boost_threshold, pre_len, pre_scale, longer_prob)
Calculate the Jaro-Winkler metric with parameters of your own choosing.

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