[python 练习] 计算个税

题目：利用python计算个税

说明：python有序字典的使用

代码：

 # -*- coding: utf-8 -*-

 from collections import OrderedDict

 # 税率表, 2018.10新个税
 tax_ratio = OrderedDict()
 tax_ratio[(0, 5000)] = 0
 tax_ratio[(5000, 3000)] = 0.03
 tax_ratio[(3000, 12000)] = 0.1
 tax_ratio[(12000, 25000)] = 0.2
 tax_ratio[(25000, 35000)] = 0.25
 tax_ratio[(35000, 55000)] = 0.3
 tax_ratio[(55000, 80000)] = 0.35
 tax_ratio[(80000, float('inf'))] = 0.45

 # 计算税
 def tax(income, social_benefits=0):
     income -= social_benefits
     total_tax = 0
     for k, v in tax_ratio.items():
         if income > k[1]:
             income -= k[1]
             total_tax += k[1] * v
         elif k[0] < income < k[1]:
             total_tax += income * v
             break
     return total_tax

 if __name__ == '__main__':
     print(tax(12705))
     print(tax(15000, 2295))
     print(tax(income=15000, social_benefits=2295))
     print(tax(social_benefits=2295, income=15000))