Python implementation of BLAST alignment algorithm? [closed]

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Is anyone aware of a pure python implementation of BLAST alignment? I am trying to stud开发者_StackOverflow中文版y this algorithm...

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In fact a complete implementation of the BLAST algorithm is a quite hard. It has a lot of steps and optimizations. What could you do is: take a look of the BLAST Book from O'Reilly, for a very good explanation, take a look of the NCBI Blast code base, that it is big and hard to understand at the first glace, or, I sugest you to take a look at other BLAST implementation or may be, others algorithms like BLAT and Genoogle (http://genoogle.pih.bio.br/)

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Try looking into BioPython:

http://biopython.org/

http://github.com/JoaoRodrigues/biopython/tree/GSOC2010