text: from aspyre.orientation import Orient3D
  import logging
  
  logger = logging.getLogger(__name__)
  
  
  class CommLineSync(Orient3D):
      """
      Define a class to estimate 3D orientations using Synchronization described as below:
      Y. Shkolnisky, and A. Singer, Viewing Direction Estimation in Cryo-EM Using Synchronization,
      SIAM J. Imaging Sciences, 5, 1088-1110 (2012).
  
      """
  
      def __init__(self, src):
          """
          constructor of an object for estimating 3D orientations
          """
          pass
  
      def estimate(self):
          """
          perform estimation of orientations
          """
          pass
  
      def output(self):
          """
          Output the 3D orientations
          """
          pass
  
  
  
  
  