text: #!/usr/bin/python
  # -*- coding: utf-8 -*-
  
  class AA(object):
  
      """Docstring for AA. """
  
      def __init__(self, b=None, a=0.4):
          self.b = b
          self.a = a
          print(a, b)
          
  
  dt = {'b':[], 'a':1.0}
  
  aa = AA(**dt)
  