Support for some binary sequence formats for BioPython.
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BinSeqs - Support for binary sequence formats in Bioython

BinSeqs is a Python package intended to enrich the SeqIO framework from Biopython by adding support for some binary sequence formats.

Deprecation Warning

This code has now been merged into Biopython. Starting from Biopython release 1.75, all you need to do to support the formats below is to load the Bio.SeqIO module.

Consequently, this project will no longer be maintained. It will remain available online but will not be updated. All improvements and bug fixes will occur in the Biopython repository.

You can still use this module until Biopython 1.75 is released and available on your system. After that, loading the module will be a no-op and a DeprecationWarning will be emitted.

Formats supported


The BinSeqs parsers and writers are not designed to be used independently and should instead be used through the Biopython's SeqIO module.

Simply import the module to make the parsers and writers available to Biopython's SeqIO:

from Bio import SeqIO

records = list(SeqIO.parse('snapgene_file.dna', 'snapgene'))
SeqIO.write(records, 'serialcloner_file.xdna', 'xdna')


BinSeqs is free software and distributed under the terms of a BSD-like license. The full license is included in the LICENSE.txt file of the source distribution.


The project is located at (homepage) and (repository and bug tracker).