class_docstr: A proxy that represents a single shard instance within :class:`~gensim.similarity.docsim.Similarity` index.
  
  Basically just wraps :class:`~gensim.similarities.docsim.MatrixSimilarity`,
  :class:`~gensim.similarities.docsim.SparseMatrixSimilarity`, etc, so that it mmaps from disk on request (query).
class_docstr_tok: ["A","proxy","that","represents","a","single","shard","instance","within",":","class",":","`","~gensim.similarity.docsim.Similarity","`","index",".","Basically","just","wraps",":","class",":","`","~gensim.similarities.docsim.MatrixSimilarity","`",",",":","class",":","`","~gensim.similarities.docsim.SparseMatrixSimilarity","`",",","etc",",","so","that","it","mmaps","from","disk","on","request","(","query",")","."]
code: def __str__(self):
      return "%s<%i documents in %s>" % (
          self.cls.__name__,
          len(self),
          self.fullname(),
      )
  
imports: import logging
  import itertools
  import os
  import heapq
  import warnings
  import numpy
  import scipy.sparse
  from gensim import interfaces, utils, matutils
label_desc: Use image node_id 5 for calling the Shard obj's underlying member method code with example usage: obj.__str__() and returns: unknown