Lønn

def user_input():
    '''Take input from user,return a tuple'''
    while True:
        try:
            houer_pay = float(raw_input('How much is the houerly payment'))
            work_houers = float(raw_input('How many houers did she work'))
            tax = float(raw_input('How many % did she pay in taxes'))
            return houer_pay, work_houers, tax
        except ValueError:
            print 'Only numbers as input,try again'

def calculate(user_input):
    '''Caculate gross salary'''
    houer_pay, work_houers, tax = user_input
    return houer_pay * work_houers * (1-(tax/100))

if __name__ == '__main__':
    print calculate(user_input())
    help(calculate) #When we use docstring in function help works