def __virtual__():

    return __virtualname__ if salt.utils.which('htpasswd') else False
compute number of reads alignment from total number of alignments.
dataset/ETHPy150Open saltstack/salt/salt/states/htpasswd.py/__virtual__--crossover with--dataset/ETHPy150Open CGATOxford/cgat/scripts/bam2stats.py/computeMappedReadsFromAlignments