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Metaphone example in python

Metaphone example in python

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As described on the Wikipedia pagethe original Metaphone algorithm was published in as an improvement over the Soundex algorithm. Like Soundex, it was limited to English-only use. The Metaphone algorithm does not produce phonetic representations of an input word or name; rather, the output is an intentionally approximate phonetic representation.

The approximate encoding is necessary to account for the way speakers vary their pronunciations and misspell or otherwise vary words and names they are trying to spell. The Double Metaphone phonetic encoding algorithm is the second generation of the Metaphone algorithm. It makes a number of fundamental design improvements over the original Metaphone algorithm. It is called "Double" because it can return both a primary and a secondary code for a string; this accounts for some ambiguous cases as well as for multiple variants of surnames with common ancestry.

Thus it uses a much more complex ruleset for coding than its predecessor; for example, it tests for approximately different contexts of the use of the letter C alone. This is a copy of the Python Double Metaphone algorithm, taken from Andrew Collins' worka Python implementation of an algorithm in C originally created by Lawrence Philips.

Since then, improvements have been made by several contributors, viewable in the git history. If you have nose installed, you can do the following:. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. A Python implementation of the Metaphone and Double Metaphone algorithms. Branch: master.

metaphone example in python

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I want to code the Metaphone 3 algorithm myself. Is there a description? I know the source code is available for sale but that is not what I am looking for. Since the author Lawrence Philips decided to commercialize the algorithm itself it is more than likely that you will not find description.

Metaphone is a phonetic algorithm, an algorithm published in for indexing words by their English pronunciation. It fundamentally improves on the Soundex algorithm by using information about variations and inconsistencies in English spelling and pronunciation to produce a more accurate encoding, which does a better job of matching words and names which sound similar [ The Metaphone algorithm operates by first removing non-English letters and characters from the word being processed.

Next, all vowels are also discarded unless the word begins with an initial vowel in which case all vowels except the initial one are discarded. Finally all consonents and groups of consonents are mapped to their Metaphone code. The rules for grouping consonants and groups thereof then mapping to metaphone codes are fairly complicated; for a full list of these conversions check out the comments in the source code section. If you are interested in the specifics of the Metaphone 3 algorithm, I think you are out of luck short of buying the source code, understanding it and re-creating it on your own : the whole point of not making the algorithm of which the source you can buy is an instance public is that you cannot recreate it without paying the author for their development effort providing the "precise algorithm" you are looking for is equivalent to providing the actual code itself.

Consider the above quotes: the development of the algorithm involved a "test harness of [ Unless you happen to have such test harness or are able to create one, you will not be able to replicate the algorithm. On the other hand, implementations of the first two iterations Metaphone and Double Metaphone are freely available the above Wikipedia link contains a score of links to implementations in various languages for bothwhich means you have a good starting point in understanding what the algorithm is about exactly, then improve on it as you see fit e.

Actually Metaphone3 is an algorithm with many very specific rules being a result of some test cases analysis. So it's not only a pure algorithm but it comes with extra domain knowledge. To obtain these knowledge and specific rules the author needed to put in a great effort. That's why this algorithm is not open-source. There is an alternative anyway which is open-source: Double Metaphone. Learn more. What is the Metaphone 3 Algorithm? Ask Question.Released: Feb 25, View statistics for this project via Libraries.

Pyphonetics is a Python 3 library for phonetic algorithms. Right now, the following algorithms are implemented and supported:. The module was largely based on the implementation of phonetic algorithms found in the Talisman. Feb 25, Feb 21, Nov 17, Download the file for your platform. If you're not sure which to choose, learn more about installing packages. Warning Some features may not work without JavaScript. Please try enabling it if you encounter problems. Search PyPI Search.

Latest version Released: Feb 25, A Python 3 phonetics library. Navigation Project description Release history Download files. Project links Homepage. Maintainers Lilykos.

metaphone example in python

Project description Project details Release history Download files Project description Pyphonetics is a Python 3 library for phonetic algorithms. Instalation The module is available in PyPI, just use pip install pyphonetics.

Project details Project links Homepage. Release history Release notifications This version. Download files Download the file for your platform. Files for pyphonetics, version 0. Close Hashes for pyphonetics File type Wheel. Python version py2. Upload date Feb 25, Hashes View.

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File type Source. Python version None.Create your free Platform account to download ActivePython or customize Python with the packages you require and get automatic updates. As described on the Wikipedia pagethe original Metaphone algorithm was published in as an improvement over the Soundex algorithm.

metaphone example in python

Like Soundex, it was limited to English-only use. The Metaphone algorithm does not produce phonetic representations of an input word or name; rather, the output is an intentionally approximate phonetic representation.

The approximate encoding is necessary to account for the way speakers vary their pronunciations and misspell or otherwise vary words and names they are trying to spell. The Double Metaphone phonetic encoding algorithm is the second generation of the Metaphone algorithm.

It makes a number of fundamental design improvements over the original Metaphone algorithm. It is called "Double" because it can return both a primary and a secondary code for a string; this accounts for some ambiguous cases as well as for multiple variants of surnames with common ancestry.

Thus it uses a much more complex ruleset for coding than its predecessor; for example, it tests for approximately different contexts of the use of the letter C alone. This is a copy of the Python Double Metaphone algorithm, taken from Andrew Collins' worka Python implementation of an algorithm in C originally created by Lawrence Philips. Since then, improvements have been made by several contributors, viewable in the git history.

A resources directory is included with this project which contains the following:. If you have nose installed, you can do the following:. ActivePython Enterprise Edition guarantees priority access to technical support, indemnification, expert consulting and quality-assured language builds. Privacy Policy Contact Us Support. All rights reserved.

All other marks are property of their respective owners. Download ActivePython. Metaphone 0. Python 2. Author Andrew Collins. License BSD.

Depended by us. Imports metaphone metaphone. Lastest release version 0. About Metaphone As described on the Wikipedia pagethe original Metaphone algorithm was published in as an improvement over the Soundex algorithm.

Double Metaphone The Double Metaphone phonetic encoding algorithm is the second generation of the Metaphone algorithm. Usage Running the Unit Tests metaphone uses the unittest package from the standard library, and as such, its tests are runable by most test runners. Example Code The unit tests are full of examples, so be sure to check those out.

Matthew Somerville uses it on Theatricalia to do people name matching, and it appears to work quite well. The database stores the double metaphones for first and last names, and then upon searching simply computes the double metaphones of what has been entered and looks up anything that matches.

Duncan McGreggor uses it on the tharsk project to provide greater full text search capabilities for Indo-European language word lists and dictionaries. Subscribe to package updates Last updated Nov 20th, Released: Aug 24, A Python implementation of the metaphone and double metaphone algorithms.

View statistics for this project via Libraries. As described on the Wikipedia pagethe original Metaphone algorithm was published in as an improvement over the Soundex algorithm.

EXAMPLE - Double Metaphone Functions

Like Soundex, it was limited to English-only use. The Metaphone algorithm does not produce phonetic representations of an input word or name; rather, the output is an intentionally approximate phonetic representation.

The approximate encoding is necessary to account for the way speakers vary their pronunciations and misspell or otherwise vary words and names they are trying to spell.

The Double Metaphone phonetic encoding algorithm is the second generation of the Metaphone algorithm. It makes a number of fundamental design improvements over the original Metaphone algorithm.

Thus it uses a much more complex ruleset for coding than its predecessor; for example, it tests for approximately different contexts of the use of the letter C alone. Since then, improvements have been made by several contributors, viewable in the git history. If you have nose installed, you can do the following:. Aug 24, Jul 22, Download the file for your platform. If you're not sure which to choose, learn more about installing packages. Warning Some features may not work without JavaScript.

Please try enabling it if you encounter problems. Search PyPI Search. Metaphone 0. Latest version Released: Aug 24, Navigation Project description Release history Download files. Project links Homepage. Maintainers oubiwann.

About A Python implementation of the Metaphone and Double Metaphone algorithms Metaphone As described on the Wikipedia pagethe original Metaphone algorithm was published in as an improvement over the Soundex algorithm. Double Metaphone The Double Metaphone phonetic encoding algorithm is the second generation of the Metaphone algorithm. Usage Running the Unit Tests metaphone uses the unittest package from the standard library, and as such, its tests are runnable by most test runners.

Example Code The unit tests are full of examples, so be sure to check those out. Matthew Somerville uses it on Theatricalia to do people name matching, and it appears to work quite well. The database stores the double metaphones for first and last names, and then upon searching simply computes the double metaphones of what has been entered and looks up anything that matches. Project details Project links Homepage. Release history Release notifications This version.

Download files Download the file for your platform. Files for Metaphone, version 0. Close Hashes for Metaphone File type Source.When exploring the use of the Metaphone algorithm for fuzzy search, Phil couldn't find a SQL version of the algorithm so he wrote one. The Metaphone algorithm is built in to PHP, and is widely used for string searches where you aren't always likely to get exact matches, such as ancestral research and historical documents.

It is particularly useful when comparing strings word-by-word. With a SQL version, it is easy to experiment on large quantities of data! It is intended for indexing words by their English pronunciation. It is one of the more popular of the phonetic algorithms and was published by Lawrence Philips in A Metaphone is up to ten characters in length. It is used for fuzzy searches for records where each string to be searched has an index with a Metaphone key.

You search for all records with the same or similar metaphone key and then refine the search by some ranking algorithm such as Damerau—Levenshtein distance. The current version, Metaphone 3, is actively maintained by Lawrence Philips, developed to account for all spelling variations commonly found in English words, first and last names found in the United States and Europe, and non-English words whose native pronunciations are familiar to English-speakers.

The source of Metaphone 3 is proprietary, and Lawrence charges a fee to supply the source. The source to this function is here on Github. Fortnightly newsletters help sharpen your skills and keep you ahead, with articles, ebooks and opinion to keep you informed. Phil Factor real name withheld to protect the guiltyaka Database Mole, has 40 years of experience with database-intensive applications.

Despite having once been shouted at by a furious Bill Gates at an exhibition in the early s, he has remained resolutely anonymous throughout his career. View all articles by Phil Factor. Federal Healthcare Managed Service Providers. Home SQL. I have commented the source as clearly as I can to explain what is going on.

It reduces words to their basic sounds, but produces a more accurate encoding. Metaphone is a built-in operator in a number of systems such as PHP but there. It is merely. Author: Phil Factor.

String Comparisons in SQL: The Metaphone Algorithm

Revision: 1. Select dbo.

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Metaphone 'opportunities'. A string representing the Metaphone equivalent of the word. Thanks Ros Presser. END. Otherwise, 'C' transforms to 'K'.

Otherwise, 'D'. Drop 'G'. Otherwise, 'G' transforms to 'K'. THEN 1. THEN 1 -- -dge, i, y. Drop 'T' if followed by 'CH'. THEN 'X'. THEN 'T'. Drop 'W' if not followed by a vowel. Otherwise, 'X' transforms to 'KS'.