docstr: Group closeness centrality for a single node group
docstr_tok: ["Group","closeness","centrality","for","a","single","node","group"]
code: def test_group_closeness_single_node(self):
      """
      Group closeness centrality for a single node group
      """
      G = nx.path_graph(5)
      c = nx.group_closeness_centrality(G, [1])
      c_answer = nx.closeness_centrality(G, 1)
      assert c == c_answer
  
imports: import pytest
  import networkx
label_desc: Use image node_id 1 for calling the TestGroupClosenessCentrality obj's underlying member method code with example usage: obj.test_group_closeness_single_node() without return types