Another report, but not context based

def get_report(self):
    """Another report, but not context based"""
    ostr = ''
    ostr += "target\tquery\tcnt\ttotal\n"
    poss = ['-','A','C','G','T']
    for target in poss:
      for query in poss:
        ostr += target+ "\t"+query+"\t"+str(self.matrix[target][query])+"\t"+str(self.alignment_length)+"\n"
    return ostr