Python exercises Task 3 (Chapter 3 & 4)

ex4_4.py

#!/usr/local/bin/python3.2

def computepay(hours, rate):
    if hours < 1: raise ValueError("No hours")
    if rate < 1.0: raise ValueError("No rate")
    
    if hours > 40:
        return (40 * rate) + ((hours - 40) * rate * 1.5)
    else:
        return hours * rate

try: 
    hours = int(input("Enter Hours: "))
    rate = float(input("Enter Rate: "))
    print(computepay(hours, rate))
except ValueError as ex:
    print("Please enter only numbers:", ex)

ex4_5.py

#!/usr/local/bin/python3.2

def computegrade(score):
    if score > 1 or score < 0: return "Bad score"

    if score >= 0.9:
        return"A"
    elif score >= 0.8:
        return"B"
    elif score >= 0.7:
        return "C"
    elif score >= 0.6:
        return "D"
    elif score < 0.6:
        return "F"

try:
    score = float(input("Enter score: "))
    print(computegrade(score))
except ValueError as ex:
    print("Bad score")
    exit()