Au Tax calculator | Python Fiddle

import sys

BANDS = { 19400: 0.0,
          37000: 19.0,
          80000: 32.5,
          180000: 37.0,
}

def calc(income):
    super_amount = income * (10.0/100.0)
    taxable_income = income - super_amount 
    last_band_start = 0
    tax_total = 0
    max_band_reached = False

print '\nNet income: %d \n'\
          'Superannuation @10 pct: %d \n'\
          'Taxable income: %d\n' % (income, super_amount, taxable_income)

for band_limit, percent in BANDS.iteritems():
        if max_band_reached:
            break
        msg = 'Band: {start} - {finish}, rate: {percent}, '.format(
            start=last_band_start+1, percent=percent, finish=band_limit)

if band_limit >= income:
            band_taxable_amount = taxable_income - last_band_start
            max_band_reached = True
        else:
            band_taxable_amount = band_limit - last_band_start

tax = band_taxable_amount * (percent/100.0)

tax_total = tax_total + tax
        last_band_start = band_limit
        print msg + 'taxed amount: %d, tax: %d' % (band_taxable_amount, tax)

medicare_levy = taxable_income  * (2.0/100.0)
    net_income = int(income - tax_total - super_amount - medicare_levy)
    print '\n====================\n'\
          'Gross income: %d \n'\
          'Super:  %d \n'\
          'Taxable income: %d \n'\
          'Medicare levy: %d \n'\
          'Total tax: %d \n'\
          'Income after tax, super and Medicare levy: %d \n\n'\
          '=========================================\n'\
          'Net Monthly income:  $%d  \n'\
          '=========================================\n'\
          '\nEffective Hourly rate (40 hours/week): $%s/hour\n'\
          '\nEffective Daily rate  ( 5 days/week): $%s/day\n'  % (income, super_amount, taxable_income,
                                  medicare_levy, tax_total, net_income,
                                  net_income/12, (net_income/12)/(40 * 4),
                                  (net_income/12)/(5 * 4))

if __name__ == '__main__':
    try:       
    	gross_amount = eval(sys.argv[1])
    except:
        # Assume 4 weeks public holidays + sick + annual leave
        working_weeks_per_year = 48
        working_days_per_month = 5
        daily_rate = 650
        gross_amount = daily_rate * working_weeks_per_year * working_days_per_month	 
        print 'Using gross amount: %d' % gross_amount

calc(gross_amount)

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