code: def testClusterAllocationSample1NumpyArrayUserDefined(self):
      metric = distance_metric(
          type_metric.USER_DEFINED,
          func=distance_metric(type_metric.EUCLIDEAN),
      )
      input_data = numpy.array(
          read_sample(SIMPLE_SAMPLES.SAMPLE_SIMPLE1)
      )
      initial_centers = numpy.array([[3.7, 5.5], [6.7, 7.5]])
      KmediansTestTemplates.templateLengthProcessData(
          input_data, initial_centers, [5, 5], True, metric=metric
      )
  
imports: import unittest
  import numpy
  import matplotlib
  from pyclustering.cluster.tests.kmedians_templates import KmediansTestTemplates
  from pyclustering.cluster.kmedians import kmedians
  from pyclustering.samples.definitions import SIMPLE_SAMPLES
  from pyclustering.core.tests import remove_library
  from pyclustering.utils import read_sample
  from pyclustering.utils.metric import type_metric, distance_metric
label_desc: Use image node_id 15 for calling the KmediansIntegrationTest obj's underlying member method code with example usage: obj.testClusterAllocationSample1NumpyArrayUserDefined() without return types