#!/home/lab391/Ureka/variants/common/bin/python
# Do not write anything above or delete the line above

####DIRECTIONS!#######
# Cut and paste the commands below in the pyraf environment. 
# Be sure to import the following libraries:

import numpy as np
import math
from pylab import *

x = 78
y = 5*x**(1/3) + sqrt(x)+log10(x)
z = math.pi*x**2
print '**Example 1**'
print 'This is x, y, and z'
print x,y,z
print

# If you have a list of data (aka array) which you will have,you need
# to enter it like the following example
x=[3,0,5,6,1,2]
print '**Example 2**'
print 'This is called a list in python'
print x
print 

# If you want to operate on each element, use the syntax
# y = [function(element) for element in x], see the example below:

# multiply each element of x by 3 and save it as variable y
# We can call each element 'a' for convenience.
y = [3*a for a in x]
print '**Example 3**'
print 'I just multipled x by 3'
print x, y
print

# if you want to add or subtract...etc a list by another list, use syntax:
# z = [function(element1, element2) for element1,element2 in zip(x,y)] 
# assuming you have defined y
x=[3,0,5,6,1,2]
y=[34,23,10,98,3]
z = [a-b+9 for a,b in zip(x,y)]
print '**Example 4**'
print 'This is x,y and x-y+9'
print x
print y
print z

#Note you can run this script in a terminal window 
# without running pyraf or python by typing ./myscript.py