text: #!/usr/bin/env python
  """
  my world module
  """
  
  def func1():
      """
      func1 function
      """
      print 'executing the world function func1'
  
  class MyClass(object):
      def __init__(self, x, y, z):
          self.x = x
          self.y = y
          self.z = z
  
      def hello(self):
          sum = self.x + self.y + self.z
          print 'Hello. Sum of input is: %d' %sum
  
      def not_hello(self):
          prod = self.x * self.y * self.z
          print 'Not Hello, prints product: %d' %prod
  
  class MyChildClass(MyClass):
      """
      overide hello Method of parent MyClass.
      """
  
      def hello(self):
          average_val = (self.x + self.y + self.z)/3
          print 'Hello overide. The average value is: %d' %average_val
  
  if __name__ == '__main__':
      print 'main of world module'
  