4-6

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

# main.py
""" Task: Exercise 4.6:
    Rewrite your pay computation with time-and-a-half for overtime and create a
    function called computepay which takes two parameters (hours and rate).
    Enter Hours: 45
    Enter Rate: 10
    Pay: 475.0
"""

# Functions
def computepay(hours, rate):
    """
    Computes the payment from hours * rate, above 40h: hours * rate * 1.5
    Returns pay
    """
    if float(hours) <= 40:
        pay = round(float(hours) * float(rate), 2)
    else:
        pay = round(40.0 * float(rate)
                    + (float(hours) - 40) * (float(rate) * 1.5), 2)
                    # 40 hours with normal rate, rest with rate * 1.5
    return pay

def value_input():
    """
    Lets the user input 'hours' and 'rate'
    Returns hours, rate
    """
    hours = None
    rate = None
    # Hours input
    while hours == None:
        try:
            hours = float(input("Enter hours: "))
        except ValueError:
            print("Invalid input!")
            continue
        except:
            print("Error!")
            continue
        if hours < 0:
            print("Please enter a positive value!")
            hours = None
    # Rate input
    while rate == None:
        try:
            rate = float(input("Enter rate: "))
        except ValueError:
            print("Invalid input!")
            continue
        except:
            print("Error!")
            continue
        if rate < 0:
            print("Please enter a positive value!")
            rate = None

    return hours, rate

# Main
amount = None   # The amount of data records (loops to compute the payment)
# Amount input
while amount == None:
    try:
        amount = int(input("Enter amount: "))
    except ValueError:
        print("Invalid input!")
        continue
    except:
        print("Error!")
        continue
    if amount < 0:
        print("Please enter a positive value!")
        amount = None

for i in range(0, amount):
    entry = value_input()
    pay = computepay(entry[0], entry[1])
    print("Pay: " + str(pay) + "\n")