8-6

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

# main.py
""" Task: Exercise 8.6
    Rewrite the program that prompts the user for a list of numbers and prints
    out the maximum and minimum of the numbers at the end when the user enters
    “done”. Write the program to store the numbers the user enters in a list
    and use the max() and min() fuctions to compute the maximum and minimum
    numbers after the loop completes.

    Enter a number: 6
    Enter a number: 2
    Enter a number: 9
    Enter a number: 3
    Enter a number: 5
    Enter a number: done

    Maximum: 9.0
    Minimum: 2.0
"""

''' Main '''
numbers = list()    # empty list
entry = None
while entry == None or entry != "done":
    try:
        entry = input("Enter a number: ")
        if entry == "done":     # break loop
            break
        entry = float(entry)
        numbers += [entry]
    except ValueError:          # invalid value
        print("Invalid value!")
        entry = None
    except:                     # unknown error
        entry = None
print("Maximum: " + str(max(numbers)))
print("Minimum: " + str(min(numbers)))