finance/equal_principal_interest.py


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def monthly_analysis(p, r, n):
    r = r/12
    month_p_and_i = p*r*(1+r)**n/((1+r)**n - 1)
    remaining_p = p
    for i in range(n):
        month_i = remaining_p*r
        month_p = month_p_and_i - month_i
        remaining_p -= month_p
        print(i, month_p_and_i, month_p, month_i)


if __name__ == '__main__':
    p = 2000000
    r = 0.055
    n = 30*12
    monthly_analysis(p, r, n)