text: """The script that produces bristlecone_heatmap_example.png."""
  
  import matplotlib.pyplot as plt
  import numpy as np
  import cirq
  
  
  def main():
      value_map = {(qubit.row, qubit.col): np.random.random()
                   for qubit in cirq.google.known_devices.Bristlecone.qubits}
  
      heatmap = cirq.Heatmap(value_map)
      fig, ax = plt.subplots(figsize=(9, 9))
      heatmap.plot(ax)
      fig.show(warn=False)
  
  
  if __name__ == '__main__':
      main()
  