キャッシュフロー・金利計算

calculate.py

# -*- coding: utf-8 -*-
def cashflow(yield_rate, interest, load_rate, yield_correct=0.01,loan_years=25):
    f = lambda r: 12 * (r * ((1 + r)** 300)) / ((1+r)**300 - 1)
    i_rate = f(interest / 12.)
    return 1.0 * (yield_rate - yield_correct) - load_rate * i_rate

def ccr(yield_rate, interest, load_rate, yield_correct=0.01,loan_years=25):
    cf = cashflow(yield_rate, interest, load_rate, yield_correct=0.01,loan_years=25)
    return cf / (1.0 - load_rate)

def ccr_table(interest_list=[0.022, 0.025, 0.028, 0.03],
              yield_rate_list=[0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1],
              load_rate_list=[0, 0.3, 0.5, 0.6, 0.7, 0.8, 0.9]):
    """docstring for crr_table"""
    for interest in interest_list:
        print
        print("金利 %.1f%%" % (interest * 100.,))
        print("-----------")
        # line = "| 表面利回り: %.1f |" % yield_rate * 100;
        print("|融資割合\t\t|"+ "".join(["%.1f%%\t|" % (y * 100.) for y in  load_rate_list]))
        for yield_rate in yield_rate_list:
            line = "|表面利回り: %.2f%%\t|" % (yield_rate * 100.);
            for load_rate in load_rate_list:
                line += "%0.3f\t|" % ccr(yield_rate, interest, load_rate)
            print(line)
        print("-----------")
                
print(ccr_table())