code: def cluster_hepta():
      template_clustering(
          7, FCPS_SAMPLES.SAMPLE_HEPTA, [type_link.CENTROID_LINK]
      )
  
imports: from pyclustering.cluster import cluster_visualizer
  from pyclustering.cluster.agglomerative import agglomerative, type_link
  from pyclustering.utils import read_sample
  from pyclustering.utils import timedcall
  from pyclustering.samples.definitions import SIMPLE_SAMPLES, FCPS_SAMPLES
label_desc: Use image node_id 13 for calling a global function with example usage: cluster_hepta() without return types