{AH} force_str for py2 compatibility
{AH} force_str for py2 compatibility

kyleabeauchamp/pysam,pysam-developers/pysam,pysam-developers/pysam,pysam-developers/pysam,kyleabeauchamp/pysam,kyleabeauchamp/pysam,pysam-developers/pysam,kyleabeauchamp/pysam,kyleabeauchamp/pysam