Python 如何使用此公式计算每月购买付款？

付款=（费率*（1+费率）^N）/（（1+费率）^N）-1））

我被告知“编写一个Python模块（loan.py），为贷款金额、月利率和数字赋值 使用上述公式计算每月付款。”

例如：“如果贷款金额为10000美元，月利率为0.01（或12%年利率），则 付款数量为36，每月付款应为332.14美元。请验证您的程序是否有效 通过使用此数据作为输入，可以正确地执行此操作。”

我尝试过使用下面的代码，但有人告诉我，我正在“将一个浮点除以0”

如果你能告诉我我做错了什么，我将非常感激

interest_rate=eval(input("What's the loan amount?"))
loan_amount=interest_rate*1.0

interest_rate=eval(input("What's the monthy interest rate?(as a fraction)"))
interest_rate=interest_rate*1.0

number_of_payments=eval(input("What's the number of payments you need to make?")) 
number_of_payments=number_of_payments*1.0

monthly_payment=((interest_rate*(1+interest_rate)**number_of_payments)/(((1+interest_rate)**number_of_payments)-1))

print("Your monthly payment amount would be: ",monthly_payment*loan_amount)

请始终尝试在代码中使用有意义的变量名…这将使您的编程更加轻松

interest_rate=eval(input("What's the loan amount?"))
loan_amount=interest_rate*1.0

interest_rate=eval(input("What's the monthy interest rate?(as a fraction)"))
interest_rate=interest_rate*1.0

number_of_payments=eval(input("What's the number of payments you need to make?")) 
number_of_payments=number_of_payments*1.0

monthly_payment=((interest_rate*(1+interest_rate)**number_of_payments)/(((1+interest_rate)**number_of_payments)-1))

print("Your monthly payment amount would be: ",monthly_payment*loan_amount)