# squareEach-6.11.py
# Return the squares of an input list without modifying the input list
# Neal Nelson   2007.10.30

def squareEach(nums):

    # Start a new list to put the squares into
    squares = []
    for i in range(len(nums)):
        squares.append(nums[i] ** 2)
    return squares     

def main():
    nums = input("Enter a list of numbers with brackets, eg, [4,6,8] :")
    print nums    # should print eg [4,6,8]
 
    print "Squaring this list gives:", squareEach(nums)          
    print nums    # should print eg [4,6,8]
    
main()