new_contents: # coding: utf-8
  
  #$ header class Matrix(public)
  #$ header method __init__(Matrix, int, int)
  #$ header method __del__(Matrix)
  
  class Matrix(object):
      def __init__(self, n_rows, n_cols):
          self.n_rows = n_rows
          self.n_cols = n_cols
          self.a = zeros((n_rows, n_cols), double)
  
      def __del__(self):
          del self.a
  
  
subject: add example class def