如何用Python根据个人所得税计算年收入其中免征额固定为60000元，各项附加扣除固定为18000

如何用Python根据个人所得税计算年收入其中免征额固定为60000元，各项附加扣除固定为18000

方法1：

def caltax(shouru):
    mtax = 60000  # 免征额
    addit = 18000  # 附加扣除

    shiji = shouru - mtax - addit
   

    # 计算税额
    if shiji <= 36000:
        tax_amount = shiji * 0.03
    elif 36000 < shiji <= 144000:
        tax_amount = 36000 * 0.03 + (shiji - 36000) * 0.1
    elif 144000 < shiji <= 300000:
        tax_amount = 36000 * 0.03 + (144000 - 36000) * 0.1 + (shiji - 144000) * 0.2
    elif 300000 < shiji <= 420000:
        tax_amount = 36000 * 0.03 + (144000 - 36000) * 0.1 + (300000 - 144000) * 0.2 + (shiji - 300000) * 0.25
    elif 420000 < shiji <= 660000:
        tax_amount = 36000 * 0.03 + (144000 - 36000) * 0.1 + (300000 - 144000) * 0.2 + (420000 - 300000) * 0.25 + (shiji - 420000) * 0.3
    elif 660000 < shiji <= 960000:
        tax_amount = 36000 * 0.03 + (144000 - 36000) * 0.1 + (300000 - 144000) * 0.2 + (420000 - 300000) * 0.25 + (660000 - 420000) * 0.3 + (shiji - 660000) * 0.35
    else:
        tax_amount = 36000 * 0.03 + (144000 - 36000) * 0.1 + (300000 - 144000) * 0.2 + (420000 - 300000) * 0.25 + (660000 - 420000) * 0.3 + (960000 - 660000) * 0.35 + (shiji - 960000) * 0.45

    return max(0, tax_amount)


# 示例用法
shouru = int(input("请输入年收入"))
taxsj = caltax(shouru)
print("年收入：{}元，应缴个人所得税：{}元".format(shouru, taxsj))

方法2：

def caltax(shouru):
    mtax = 60000  # 免征额
    addit = 18000  # 附加扣除

    shiji = shouru - mtax - addit

    # 税率表
    taxtable = [(0, 36000, 0.03),
                       (36000, 144000, 0.1),
                       (144000, 300000, 0.2),
                       (300000, 420000, 0.25),
                       (420000, 660000, 0.3),
                       (660000, 960000, 0.35),
                       (960000, float('inf'), 0.45)]

    # 计算税额
    tax_amount = 0
    for lower, upper, rate in taxtable:
        if shiji <= lower:
            break
        elif lower < shiji <= upper:
            tax_amount += (shiji - lower) * rate
            break
        else:
            tax_amount += (upper - lower) * rate

    return max(0, tax_amount)


# 示例用法
shouru=int(input("请输入年收入"))
taxsj = caltax(shouru)
print("年收入：{}元，应缴个人所得税：{}元".format(shouru, taxsj))