class_docstr: A matrix representation out of features.
class_docstr_tok: ["A","matrix","representation","out","of","features","."]
docstr: Args:
      a_matrix: A matrix with rows that represent records
          to search against.
      records_data: Data to return when a doc is matched. Index of
          corresponds to features.
  Returns:
      A dense array representing distance.
code: def _distance(self, a_matrix):
      """
      Args:
          a_matrix: A matrix with rows that represent records
              to search against.
          records_data: Data to return when a doc is matched. Index of
              corresponds to features.
      Returns:
          A dense array representing distance.
      """
      return
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import abc
  import numpy
  import scipy.sparse
  import scipy.spatial.distance
label_desc: Use image node_id 7 for calling the MatrixMetricSearch obj's underlying member method code with example usage: obj._distance(a_matrix) without return types