5-1

#! /usr/bin/env python3.2
# -*- coding: utf-8 -*-

# main.py
""" Task: 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 their
    mistake using try and except and print an error message and skip to the
    next number.
    Enter a number: 4
    Enter a number: 5
    Enter a number: bad data
    Invalid input
    Enter a number: 7
    Enter a number: done
    16 3 5.33333333333
"""

# Main
number = None
numbers = []
count = 0
total = 0
while number != "done":
    try:
        number = input("Enter a number: ")
        if number == "done":
            break
        try:
            number = float(number)
        except ValueError:
            print("Invalid input")
            continue    # skip code below
    except:
        print("Error")
        continue    # skip code below
    numbers.append(number)  # appends the number at the end of a list 'numbers'
    count += 1

# Calculate total
for num in numbers:
    total += num

# Calculate average
average = total / count

print(str(total) + " " + str(count) + " " + str(average))