Python - 计算个人所得税

最近在学python，写了个计算个人所得税计算的脚本，分享。

以下为python3适用版本

#!/usr/bin/python
# -*- coding: UTF-8 -*-
# 该python脚本用于计算税后工资

# 提示用户输入工资
sal = input("Please input your salary: \n") 

# 自定义一个异常
class MyException(Exception):
    def __init__(self, *args):
        self.args = args

try:
	sal = int(sal)
	if sal < 0:
		raise MyException
except ValueError:
	print("给劳资输一个整数，别带字母和小数！\n")
except MyException:
	print("你大爷的，工资是负数？\n")
else:
	# 计算社保和公积金以及扣除该部分之后的工资
	shebao = round(sal * 0.105, 2)
	gongjijin = round(sal * 0.07, 2)
	aft_sal = sal - shebao - gongjijin

	# 税率(这个没变)
	sui_lv = [0.45, 0.35, 0.3, 0.25, 0.2, 0.1, 0.03]

	# 税改前超出起征点各阶段工资
	jin_e1 = [80000, 55000, 35000, 9000, 4500, 1500, 0]

	# 税改后超出起征点各阶段工资
	jin_e2 = [80000, 55000, 35000, 25000, 12000, 3000, 0]

	# 起征点(调整前3500，调整后5000)
	qizheng1 = 3500
	qizheng2 = 5000

	# 应缴税工资：税前工资-社保-公积金-起征点
	yinjiao1 = aft_sal - qizheng1
	yinjiao2 = aft_sal - qizheng2

	# 定义计算所得税函数
	# a应缴税工资，b超出起征点各阶段工资，c税率
	def jisuan(a, b, c):
		sum = 0
		for i in range(0, len(b)):
			if a > b[i]:
				sum += (a - b[i]) * c[i]
				a = b[i]
		return round(sum, 2)

	# 计算所得税
	suodesui1 = jisuan(yinjiao1, jin_e1, sui_lv)
	suodesui2 = jisuan(yinjiao2, jin_e2, sui_lv)

	print("\n税前月收入: {}".format(sal))
	print("五险一金: {}".format(shebao + gongjijin))
	print("旧税率应纳税: {} 元，税后收入: {} 元".format(suodesui1, round(aft_sal-suodesui1, 2)))
	print("新税率应纳税: {} 元，税后收入: {} 元\n".format(suodesui2, round(aft_sal-suodesui2, 2)))

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以下为python2适用的版本

#!/usr/bin/python
# -*- coding: UTF-8 -*-
# 该python脚本用于计算税后工资

# 提示用户输入工资
sal = raw_input("Please input your salary: \n")

# 自定义一个异常
class MyException(Exception):
    def __init__(self, *args):
        self.args = args

try:
	sal = int(sal)
	if sal < 0:
		raise MyException
except ValueError:
	print("给劳资输一个整数，别带字母和小数！\n")
except MyException:
	print("你大爷的，工资是负数？\n")
else:
	# 计算社保和公积金以及扣除该部分之后的工资
	shebao = round(sal * 0.105, 2)
	gongjijin = round(sal * 0.07, 2)
	aft_sal = sal - shebao - gongjijin

	# 税率(这个没变)
	sui_lv = [0.45, 0.35, 0.3, 0.25, 0.2, 0.1, 0.03]

	# 税改前超出起征点各阶段工资
	jin_e1 = [80000, 55000, 35000, 9000, 4500, 1500, 0]

	# 税改后超出起征点各阶段工资
	jin_e2 = [80000, 55000, 35000, 25000, 12000, 3000, 0]

	# 起征点(调整前3500，调整后5000)
	qizheng1 = 3500
	qizheng2 = 5000

	# 应缴税工资：税前工资-社保-公积金-起征点
	yinjiao1 = aft_sal - qizheng1
	yinjiao2 = aft_sal - qizheng2

	# 定义计算所得税函数
	# a应缴税工资，b超出起征点各阶段工资，c税率
	def jisuan(a, b, c):
		sum = 0
		for i in range(0, len(b)):
			if a > b[i]:
				sum += (a - b[i]) * c[i]
				a = b[i]
		return round(sum, 2)

	# 计算所得税
	suodesui1 = jisuan(yinjiao1, jin_e1, sui_lv)
	suodesui2 = jisuan(yinjiao2, jin_e2, sui_lv)

	print("\n税前月收入: %d" % sal)
	print("五险一金: %.2f" % (shebao + gongjijin))
	print("旧税率应纳税: %.2f 元，税后收入: %.2f 元" % (suodesui1, (aft_sal-suodesui1)))
	print("新税率应纳税: %.2f 元，税后收入: %.2f 元\n" % (suodesui2, (aft_sal-suodesui2)))