van.py

Created on January 13, 2024
1.27 KB
def calculate_npv(rate, cash_flows):
    npv = 0
    for i in range(len(cash_flows)):
        npv += cash_flows[i] / ((1 + rate) ** i)
    return npv

def calculate_irr(cash_flows):
    rate, increment = 0.01, 0.0001
    npv = calculate_npv(rate, cash_flows)
    while npv > 0:
        rate += increment
        npv = calculate_npv(rate, cash_flows)
    return rate

def financial_metrics():
    cash_flows = []
    rate = float(input("Taux : "))
    initial_investment = float(input("Invest. init. : "))
    cash_flows.append(-initial_investment)
    years = int(input("Nb d'années : "))
    
    for i in range(1, years + 1):
        cf = float(input("Flux année " + str(i) + " : "))
        cash_flows.append(cf)
    
    npv = calculate_npv(rate, cash_flows)
    irr = calculate_irr(cash_flows)
    
    print("VAN : " + str(npv))
    print("TIR : " + str(irr))

    # Calcul et affichage des flux actualisés et cumulés
    cumulative_cash_flow = 0
    for i in range(len(cash_flows)):
        discounted_cf = cash_flows[i] / ((1 + rate) ** i)
        cumulative_cash_flow += discounted_cf
        print("Flux actualisé année " + str(i) + " : " + str(discounted_cf))
        print("Cumulé jusqu'à année " + str(i) + " : " + str(cumulative_cash_flow))

financial_metrics()