code: def compute(self, links):
          
  
          try:
              import networkx as nx
          except ImportError():
              raise Exception("'networkx' module is needed for this operation")
  
          G = nx.Graph()
          G.add_edges_from(links.values)
          connected_components = nx.connected_component_subgraphs(G)
  
          links_result = [pd.MultiIndex.from_tuples(subgraph.edges())
                          for subgraph in connected_components]
  
          return links_result
docs: Return the connected components.
  
          Parameters
          ----------
          links : pandas.MultiIndex
              The links to apply one-to-one matching on.
  
          Returns
          -------
          list of pandas.MultiIndex
              A list with pandas.MultiIndex objects. Each MultiIndex
              object represents a set of connected record pairs.