r""" 
Utility Functions 
=================

.. warning:: User access of this module is discouraged 

Contains utility functions for testing. 
""" 

import math 


def dummy1(x): 
	r""" 
	A dummy function of one variable 
	""" 
	return x 


def dummy2(x, y): 
	r""" 
	A dummy function of two variables 
	""" 
	return x * y 


def dummy3(x): 
	r""" 
	A dummy function of one variable 
	""" 
	return math.sin(x) 

