5.1

# #!/usr/bin/python
#
# By dvdjaco
# Exercise 5.1
#
# Write a program which repeatedly reads numbers until the user enters 'done'.
# Once 'done' is entered, print out the total, count, and average of the numbers. If the user enters
# anything other than a number, detect t

l = list()

while True:
    num = (raw_input("Enter a number: "))
    if num == 'done' : break
    try:
        l.append(float(num))
    except:
        print "Invalid input"

print sum(l), len(l), sum(l)/len(l)