Changes

     from numpy import *

     from numpy import *

For more informnation:

For more information:

Python language, see http://docs.python.org/tutorial/

* Python language, see http://docs.python.org/tutorial/

Math library, see http://docs.python.org/library/math.html  

* Math library, see http://docs.python.org/library/math.html  

Time library, see http://docs.python.org/library/time.html

* Time library, see http://docs.python.org/library/time.html

Numpy library, see numpy.scipy.org/

* Numpy library, see numpy.scipy.org/

====Python code block====

====Python code block====