def get_annotation_attr(self, k, attr):
        'get the requested attribute of the requested key'
        try:
            sliceInfo = self.sliceDB[k]
        except __HOLE__:
            return ''
        try:
            return self.getSliceAttr(sliceInfo, attr)
        except AttributeError:
            return ''
dataset/ETHPy150Open cjlee112/pygr/pygr/annotation.py/AnnotationServer.get_annotation_attr