code: def read_sparse6(path):
      """Read an undirected graph in sparse6 format from path.
  
      Parameters
      ----------
      path : file or string
         File or filename to write.
  
      Returns
      -------
      G : Graph/Multigraph or list of Graphs/MultiGraphs
         If the file contains multiple lines then a list of graphs is returned
  
      Raises
      ------
      NetworkXError
          If the string is unable to be parsed in sparse6 format
  
      Examples
      --------
      You can read a sparse6 file by giving the path to the file::
  
          >>> import tempfile
          >>> with tempfile.NamedTemporaryFile(delete=False) as f:
          ...     _ = f.write(b">>sparse6<<:An\\n")
          ...     _ = f.seek(0)
          ...     G = nx.read_sparse6(f.name)
          >>> list(G.edges())
          [(0, 1)]
  
      You can also read a sparse6 file by giving an open file-like object::
  
          >>> import tempfile
          >>> with tempfile.NamedTemporaryFile() as f:
          ...     _ = f.write(b">>sparse6<<:An\\n")
          ...     _ = f.seek(0)
          ...     G = nx.read_sparse6(f)
          >>> list(G.edges())
          [(0, 1)]
  
      See Also
      --------
      read_sparse6, from_sparse6_bytes
  
      References
      ----------
      .. [1] Sparse6 specification
             <https://users.cecs.anu.edu.au/~bdm/data/formats.html>
  
      """
      glist = []
      for line in path:
          line = line.strip()
          if not len(line):
              continue
          glist.append(from_sparse6_bytes(line))
      if len(glist) == 1:
          return glist[0]
      else:
          return glist
  
file_path: networkx/networkx/readwrite/sparse6.py
imports: import networkx
  from networkx.exception import NetworkXError
  from networkx.readwrite.graph6 import data_to_n, n_to_data
  from networkx.utils import not_implemented_for, open_file
label_desc: Use image node_id 4 for calling a global function with example usage: read_sparse6(path) and returns: glist, glist