Create and run a function in Python

#Return the post-tax earnings of an individual,
#assuming varying tax brackets depending on annual wage

def calcEarnings(hours, wage):
    earnings = hours*wage
    if earnings >= 2000:
        #30% tax rate for weekly earnings above $2000
        earnings = earnings*.70
    else:
        #15% tax rate for weekly earnings below $2000
        earnings = earnings*.85
    return earnings

#return the raw earnings of an individual (assuming no varying rates for overtime)
def calcEarnings_pretax(hours, wage):
    earnings = hours*wage
    return earnings

def main():
    hours = float(input('Enter hours worked for the week: '))
    wage = float(input('Enter dollars paid per hour: '))
    total = calcEarnings(hours, wage)
    total_pre_tax = calcEarnings_pretax(hours, wage)
    taxes = total_pre_tax - total
    print('Pre-tax earnings for {hours} hours at ${wage:.2f} per hour are ${total_pre_tax:.2f}.'
          .format(**locals()))
    print('Post-tax earnings for {hours} hours at ${wage:.2f} per hour are ${total:.2f}.'
          .format(**locals()))
    print('You gave uncle sam ${taxes:.2f} this week!'
          .format(**locals()))

main()

Output:

Enter hours worked for the week: 40 Enter dollars paid per hour: 55 Pre-tax earnings for 40.0 hours at $55.00 per hour are $2200.00. Post-tax earnings for 40.0 hours at $55.00 per hour are $1540.00. You gave uncle sam $660.00 this week!

You can run the above yourself if you copy/paste it into a notebook or text editor. Will ask you for two inputs (hours, wage) and calculate pre-tax earnings, post-tax earnings, and taxes paid.