Python税务计算器算法工作不正常

Question

我对python非常陌生，所以如果这个问题很简单，我很抱歉。我正在尝试编写一个算法，根据用户输入的工资计算2017年和2018年的工资差异。我已经到了这样一个地步，算法确实计算了一个税率，但是它似乎是逆向的，也就是说，投入的收入越低，欠的税就越高，这是政府尽管有缺陷，但通常不会做的事情。我尝试了不同的算法，但我仍然不知道我哪里出错了。如有任何意见或建议，我们将不胜感激。 谢谢！你知道吗

# of tax brackets
levels = 6
#2017 tax rates
rates2017 = [0, 10, 15, 25, 28, 33, 35]
#2018 tax rates
rates2018 = []
#2017 income tax thresholds
incomes2017 = [0, 9325, 37950, 91900, 191650, 416700, 418400]

# take in a value for net income and assign it to int
netincome = int(input('Please input an integer for income: '))

#initialize the variables used
tax_owed = 0
taxable_income = 0
netincomeleft = netincome - 6500
i = levels

#while loop calculates the income tax
while i >= 0:
    taxable_income = netincomeleft - incomes2017[i]
    tax_owed += taxable_income * (rates2017[i]/100)
    netincomeleft = incomes2017[i]
    i -= 1

#multiply tax owed by -1 to get a positive int for clarity
taxes_owed = tax_owed * -1

# print out the 2017 tax owed
print('tax owed on $', netincome, 'after standard deduction is ', taxes_owed)

*为了清晰起见，我在Jupyter笔记本环境中使用python3

Answer 1

编辑：我终于弄明白了。结果发现，除了特殊人群，政府征收的税并不比收入多。谢谢大家的帮助！你知道吗

levels = 6
rates2017 = [0, 10, 15, 25, 28, 33, 35]
rates2018 = []
incomes2017 = [0, 9325, 37950, 91900, 191650, 416700, 418400]

netincome = int(input('Please input an integer for income: '))
tax_owed = 0
taxable_income = 0
standard_deduction = 6500

netincomeleft = netincome - standard_deduction
i = 0

while levels >= 0 and taxable_income >=0 and netincomeleft >= 0:
    if (netincomeleft - incomes2017[i]) < 0:
        taxable_income = netincome - incomes2017[i-1] - standard_deduction
    else: 
        taxable_income = netincomeleft - incomes2017[i]
    tax_owed += (taxable_income * (rates2017[i]/100))
    netincomeleft = netincomeleft - incomes2017[i]
    i += 1
    levels -= 1

taxes_owed = tax_owed
print('tax owed on $', netincome, 'after standard deduction is ', taxes_owed)

Answer 2

你的工作大多是负数…你不检查他们的收入是否超过了特定的水平，所以当收入为100时，你向他们征收负税率（418400-100），以此类推。你知道吗

你想从第一个超过netincomeleft的数字开始，然后不要乘以-1！你知道吗

所以对于一个小收入者来说，“水平”应该从0或1开始，而不是从6开始。你知道吗

Answer 3

def USA():
    tax=0
    if salary<=9700:
        tax=9700*0.1
    elif salary<=39475:
        tax=970+(salary-9700)*0.12
    elif salary<=84200:
        tax=4543+(salary-39475)*0.22 
    elif salary<=160725:
        tax=14382.5+(salary-84200)*0.24
    elif salary<=204100:
        tax=32748.5+(salary-160725)*0.32  
    elif salary<=510300:
        tax=139918.5+(salary-204100)*0.35
    else:
        tax=328729.87+(salary-510300)*0.37
    return ('tax owed on $', salary, 'after standard deduction is ', tax, 'and your netincome is ', (salary-tax) )          
salary=int(input('Please input an integer for income: '))      
print(USA())