python计算项目净现值和内部回报率

 代码：

import numpy as np
from numpy import irr
import warnings

def project(number, period_list):
    rate = 0.08  # 贴现率
    npv = np.npv(rate, period_list)
    print("贴现率8% 项目{} 净现值:{}".format(number, npv))
    rate = 0.12  # 贴现率
    npv = np.npv(rate, period_list)
    print("贴现率12% 项目{} 净现值:{}".format(number, npv))
    print("项目{} 内部回报率:{}%".format(number, irr(period_list) * 100))

warnings.filterwarnings("ignore")
period_list1 = [-100000, 10000, 10000, 10000, 20000, 100000]  # 项目一
period_list2 = [-100000, 20000, 20000, 20000, 20000, 30000]  # 项目二
period_list3 = [-100000, 30000, 30000, 30000, 30000, 30000]  # 项目三
period_list4 = [-120000, 30000, 30000, 30000, 30000, 75000]  # 项目四

project("一", period_list1)
print("---------------------------------")
project("二", period_list2)
print("---------------------------------")
project("三", period_list3)
print("---------------------------------")
project("四", period_list4)

运行结果：