title: Scatter Plot not plotting using Managers for multiprocessing
body: <p>This program shows no error yet it produces a blank plot without any points. I later on wish to modify this code so that many processes can work in parallel to change the shared matplotlib scatter plot.   </p>
  
  <pre><code>from multiprocessing.managers import BaseManager, NamespaceProxy
  from multiprocessing import Process
  import matplotlib.pyplot as plt
  import numpy as np
  
  def plotter(res):
      print(res.ax,res.fig)
      res.ax.scatter(np.random.normal(0,20,(100,)),np.random.uniform(0,20,(100,)),s=1)
      res.fig.savefig('man2.png')
  
  
  class PlotClass():
      fig = plt.figure()
      ax = fig.add_subplot(111)
  
      def __init__(self):
          print('Test') 
  
  
  class MyManager(BaseManager):
      pass
  
  class MyAttProxy(NamespaceProxy):
      # We need to expose the same __dunder__ methods as NamespaceProxy,
      _exposed_ = ('__getattribute__', '__setattr__', '__delattr__')
  
  MyManager.register('Plot', PlotClass,MyAttProxy)
  
  if __name__ == '__main__':
      manager = MyManager()
      manager.start()
      plotscat = manager.Plot()
      pr = Process(target=plotter,args=(plotscat,))
      pr.start()
      pr.join()
      plotscat.fig.savefig('fig.png')
  </code></pre>