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  • squirtlekip
    Junior Member
    • Aug 2014
    • 1

    #1

    pysam making "mini" bam and fasta files

    Hi everybody. Previously I was using samtools to create "mini bams" (taking large bams and chopping small regions from them) however I've recently had the desire to move to python to simplify my scripts.

    Previously I just used the command:
    "samtools view -b -h input.bam chr1:start-end chr7:start-end output.bam"

    I've played with pysams fetch and pileup however they appear to miss some of the reads (quantity wise) as opposed to just iterating over the samfile. However I am open to suggestions using those methods.

    In addition I would also like to use pysam to crop fasta files in the same manner however this isn't something I have done before.
  • dpryan
    Devon Ryan
    • Jul 2011
    • 3478

    #2
    pysam shouldn't be missing any reads, it's just a python interface to the same C functions that the samtools executable uses. If you can find reproducible examples of that then it's likely a bug.

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