This program is supposed to read in a list of numbers and compute the average and standard deviation.

As it is now, it returns nothing. Any help would be greatly appreciated.

Code:
scores=raw_input('Type in scores on one line with a space between each one: ')

values = scores.split()
for i in range (len(values)):
    values[i] = int(values[i])

def average(values):
    average=sum(values)/float(len(values))
...