class_docstr: Network visualization framework entry point.
  
  Usage:
  
  .. code-block:: python
  
    NetworkVisualizer(network).render()
  
  You may optionally specify a specific renderers. e.g.:
  
  .. code-block:: python
  
    viz = NetworkVisualizer(network)
    viz.render(renderer=GraphVizRenderer)
    viz.render(renderer=NetworkXRenderer)
  
  :param network: (:class:`nupic.engine.Network`)
code: def __init__(self, network):
      self.network = network
  
imports: import networkx
  from nupic.frameworks.viz import DotRenderer
label_desc: Use image node_id 1 to create a new NetworkVisualizer object from inherited base classes: object with example: obj = NetworkVisualizer(network)