view filter-below-abund.py @ 4:7d8138b4a593 draft

planemo upload for repository https://github.com/galaxyproject/tools-iuc/blob/master/tools/khmer/ commit 19ea4feff5ccf3744c549b9a67259947a1cb90ba

#! /usr/bin/env python
# This file is part of khmer, https://github.com/dib-lab/khmer/, and is
# Copyright (C) 2011-2015, Michigan State University.
# Copyright (C) 2015, The Regents of the University of California.
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from __future__ import print_function

import os
import sys

import khmer
from khmer.thread_utils import ThreadedSequenceProcessor, verbose_fasta_iter

WORKER_THREADS = 8
GROUPSIZE = 100
CUTOFF = 50


def main():
    counting_ht = sys.argv[1]
    infiles = sys.argv[2:]

    print('file with ht: %s' % counting_ht)
    print('-- settings:')
    print('N THREADS', WORKER_THREADS)
    print('--')

    print('making hashtable')
    ht = khmer.load_countgraph(counting_ht)
    K = ht.ksize()

    for infile in infiles:
        print('filtering', infile)
        outfile = os.path.basename(infile) + '.below'

        outfp = open(outfile, 'w')

        def process_fn(record, ht=ht):
            name = record['name']
            seq = record['sequence']
            if 'N' in seq:
                return None, None

            trim_seq, trim_at = ht.trim_below_abundance(seq, CUTOFF)

            if trim_at >= K:
                return name, trim_seq

            return None, None

        tsp = ThreadedSequenceProcessor(process_fn, WORKER_THREADS, GROUPSIZE)

        tsp.start(verbose_fasta_iter(infile), outfp)


if __name__ == '__main__':
    main()